The Big Ideas were plans and devices created by Phineas Flynn and Ferb Fletcher almost every day during their summer vacation. Some of these items were used as a way of helping someone in need, while others were just to help them have the best possible summer ever. The phrase "Big Ideas" references the advertising campaign that Disney Channel ran prior to the launch of Phineas and Ferb series in February 2008. For Phineas, it was "he thinks big". For Ferb, it was "he thinks how".

The plans the boys came up with could be described as impossible because they were accomplished in a very short amount of time (less than a morning {they used the invention in the afternoon, most likely}) and involved technology that have yet to exist in the real world: teleportation, mind-switching, time traveling... Phineas and Ferb did not think of their plans as impossible, just fun and great. When Isabella Garcia-Shapiro asked Phineas if building a time machine was "kind of impossible", he replied, "That's a possibility".

Despite Phineas saying that he liked to "keep moving forward", he actually had repeated his big ideas. Examples are the rollercoaster, the waterslide, the molecular seperator and the time machine.

Phineas and Ferb were busted five times on-screen.

  • It was all Candace's dream in Perry the Platypus's dream.
  • Older Candace Flynn busted them while building the Rollercoaster, which had been undone by herself after she saw that this would lead to a dystopian society run by Emperor Heinz Doofenshmirtz. This happened in another universe. Later, Candace busted them by showing herself to future mom, but this had probably been undone by Isabella when she went back in time and made the entire episode undone during the credits. Along with the fifth time they were busted, this happened in another universe.
  • When they built a pioneer village, but that was undone when the Doofenshmirtz's acceleratorinator moved time backwards.
  • Once Candace succeeded in busting them briefly, however her mother was hit with Doof's "Forget-About-It-Inator" repeatedly and by the time she was no longer being hit by the ray, Candace had ran off and the boy's invention wasn't in view so she returned inside.
  • Linda Flynn-Fletcher "busted" Phineas and Ferb herself due to them leaving towels all over the ground.

However, there are other times where Phineas and Ferb's plots had been seen by their parents, however they weren't "busted" for them (assuming "busting" implies that they were intentioned to get in trouble for whatever they're doing). Their dad had also seen and had been involved in some of their big ideas, but it didn't seem he minded and Candace almost never got her dad to bust them which implied the busting power was from their mom.

  • One famous example is during Mom's birthday, because on that day she saw everything they built.
  • Their Mom actually saw Nosebud and said that it was "pretty cool" because it actually floated, but did not know about the station under it.
  • Mom saw the animal translator, only to her Phineas and Ferb were just using some sort of recording machine because it didn't work on Perry.
  • Mom saw only the top portion of the fort (and not the other giant parts of it). Upon seeing this, she remarked on how Phineas and Ferb were "beginning to take an interest in building things".
  • Mom saw Phineas and Ferb's creation, only Phineas and Ferb were gone and she thought it was some kind of modern art.

Also, there were other times where the plots were seen by Phineas and Ferb's parents, a good example being in "The Best Lazy Day Ever", however Candace built a dinosaur slide in that episode.

  • They built something in "Perry Lays an Egg", but Candace was the one who got in trouble.
  • Phineas and Ferb built a Latest Technology All-Terrain Vehicle but it was Candace who got into trouble as she said that she drove it herself and Mom shouted at her that she drove a car without any adult surveillance.
  • Phineas and Ferb didn't do anything in "Candace Gets Busted". But when Mom and Dad saw that Candace was having a party (the Intimate Get Together), Candace was the person busted.

Lawrence Fletcher had seen many of Phineas and Ferb's creations, but hadn't busted them.

TV Show

Season 1

Episode Image Big Idea Disappearance Notes
Flying rollercoaster
They built a backyard roller coaster. They also trained monkeys to juggle (mentioned, happened before roller coaster) Doofenshmirtz's giant magnet and Magnetism Magnifier picked it up. The rollercoaster went all over town.
"Lawn Gnome Beach Party of Terror"
Backyard beach revealed
They built a beach in their backyard and did surfing contests, limbo contests, sand castle building contests, etc. Doofenshmirtz's Destruct-inator sucked up all the water, then Phineas pushed a button to put up the fence, hiding the beach before Mom entered. It's unknown what happened to the rest of the beach afterwards. This is one of the most near-impossible plans, since the houses behind Phineas and Ferb disappeared.
"Flop Starz"
Flop Starz
They became one-hit wonders and made a band called Phineas and the Ferb-Tones to make a hit song "Gitchee Gitchee Goo." Building with ad: Got demolished.

Band: They retired.

The boys didn't know their mom used to be a one-hit wonder named Lindana.
"The Fast and the Phineas"
42 lands on the road
They entered a race with a life-size remote control car (their mom's modified car). The car went through a car wash, which took all the modifications away. (There were four other ways this project disappeared.) The boys raced in the Swamp Oil 500.
"Lights, Candace, Action!"
Reassuring Candace about the rubber snakes
They became movie directors and helped Candace make a movie, with Candace as the main character. Doofenshmirtz's Age Accelerator-inator zapped the adolescent cinema audience and turned them into pensioners, who hated the movie. The boys had an incredible number of hits on their homemade-video website and were hired as the directors of a big budget movie starring Candace.
"Raging Bully"
Phineas punching a string of sausages
Boxing ring
Phineas thumb wrestled Buford Van Stomm after accidentally dropping ice cream on him. Doofenshmirtz's Slave-inator mind controled the crowd into cleaning everything up. The boys built an arena to thumb wrestle in the Googolplex Mall parking lot.
"Candace Loses Her Head"
Candace and her monument
They carved Candace's face into Mount Rushmore for a birthday present. A lava flow caused by Doofenshmirtz's Drill-inator, caused the face to fall apart. Their work was intended as a birthday present for Candace.
"I, Brobot"
Circle of brobots
I brobot60
Zoo close-up
I brobot65
I brobot66
Robot Bean & Tea Leaf
They built a second-generation robot-building device to create the Brobots, Phinedroids and Ferbots. Doofenshmirtz's giant magnet attached to Santa Claus's sleigh, who was doing a Summer run, and then proceeded to pick up the Brobots. It is unknown what happened to the things they built. Realizing there were too many plans for the two of them to carry out, the boys enlisted the help of their newly-created robots.

A total of six plans were shown completed during this episode, with two others designed but not (explicitly) built.

"Run Away Runway"
They became fashion designers and created their own style of clothes. Doofenshmirtz's clones set a new trend for lab coats, so everyone started wearing them instead. The Summer All The Time Collection rocked the fashion world.
"The Magnificent Few"
Horse riding
They went on a cattle drive and around Danville. They rounded up the cattle and a fence, made by termites eating part of a rollercoaster, fell around them. Phineas and Ferb became cowboys and drove a herd of cattle through downtown Danville.
Snowboard Champions
They used a snow-cone machine to create a new season, S'Winter, summer and winter mixed together. Doofenshmirtz plugged in his Melt-inator, which caused a power surge, so the fans and freezers keeping it cold turned off and it melted. Isabella then invited everyone who was part of S'Winter to her house for hot cocoa. Some people called it Wummer.
"Jerk De Soleil"
They set up their own circus. Doofenshmirtz's Voice-inator filled the tent with Doofelium until it bursted. They erected a big tent in their backyard after the local performance of Cirque du Lune was canceled.
"Are You My Mummy?"
Hi, Mummy
Are You My Mummy76
They tried to find and catch a mummy and mistaked Candace, who was wrapped head to toe in toilet paper stuck to her by butter and stale bubble gum stuck in her mouth so she could only mumble incoherently, for the mummy. A water flow shattered the sarcophagus and cleaned all the toilet paper, butter, and gum off Candace. Phineas and Ferb were inspired after seeing a movie at an Egyptian-themed movie theater. The boys searched the theater basement for a real mummy, but the mummy exhibit was just promotional junk.
"Ready for the Bettys"
Inside Agent P's lair
They "became secret agents" after discovering Agent P's lair and saved Candace and the Bettys. Perry took back his hovercar and dumped the boys into Isabella's pool. Didn't actually build anything, but stumbled on Perry's secret lair and accidentally took on his secret mission. Phineas thought Ferb put the whole thing together.
"I Scream, You Scream"
Well, this can't be right
Ice cream in bed
They built the world's biggest ice cream maker for Isabella after her tonsils were removed. They accidentally got the blueprints for and winded up building Doof's Space Laser-inator and launched it. Fortunately they didn't attach the laser when it took off. They tried to create an ice cream machine but ended up making Doofenshmirtz's Space-laser-inator instead. Ferb took the laser plans by mistake because he was distracted by Vanessa. They were going to recreate the Trojan War.
"Toy to the World"
Perry the Inaction Figure
They remodeled a toy factory to produce a toy so stupidly simple, so basically bland, so idiotically uncomplicated that it could do absolutely anything. The Har D Har Toy Company stopped production of the toy when Phineas and Ferb resigned. The toy was modeled on Perry the Platypus.
"Get That Bigfoot Outa My Face!"
They scared the group with a fake Bigfoot and telling other stories. Doofenshmirtz got tied up in the wires for the Bigfoot dummies and he ran away with the fake Bigfoots in tow. Candace and their grandparents get the last laugh.
"It's a Mud, Mud, Mud, Mud World"
The candace crusher
They turned the family car into a monster truck called the Candace Crusher and made a derby. They also made their toy monster trucks went light speed. Buck Buckerson took the track and the boys turned off the modifications to the family car. They helped Candace learn to parallel park by entering her in a monster truck rally.
"Mom's Birthday"
Happy Birthday, Mom!
They threw the best birthday party ever for their Mom. N/A Highlights: A breakfast bar, a giant birthday card, a video presentation, and a satellite up-link to Dad, who was out of town.
"Journey to the Center of Candace"
They built a shrinking submarine and went inside Candace. The submarine was sucked up by a giant vacuum cleaner, and later swallowed by Pinky. They wanted to help Isabella get her sash back from her dog Pinky the Chihuahua's stomach.
"It's About Time!"
They fixed the museum's time machine and went to the time of the dinosaurs. The first time machine was stepped on by a T. Rex. The one that Isabella and the Fireside Girls built and used to rescue them did not vanish, but the T. Rex that followed them back to present day was zapped by the Freeze-inator, transforming it into a display in the museum. Other "ripples", such as Lawrence seeing an imprint of his daughter on a fossil, were undone when Phineas and Ferb rided their scooter over it, splattering the mud back in the Cretacious Period before he could show Linda. Isabella and the Fireside Girls came to the rescue after Phineas figured out how to send a message through time.
"Dude, We're Getting the Band Back Together"
Love Händel reunion concert
They reunited the band Love Händel after their dad forgot their anniversary. N/A They helped recreate the most romantic moment in their parents' relationship for their anniversary.
"Tree to Get Ready"
Treehouse Fight
They fixed up their and Candace's old tree houses and had a tree house fight. After they tripped over a cable, they rolled all over town and all the modifications fell off. The tree house fight controls were based on the ones from a wrestling video game the Candace and Stacy played.
"The Ballad of Badbeard"
Phineas and Ferb's ship
They made a pirate ship out of Grandpa Clyde's dingy. N/A They used it to find Badbeard's treasure, bad fake beards.
"Greece Lightning"
Leading the chariot race
They had a Chariot race through Danville with Phineas, Ferb, Isabella and the Fireside Girls, Buford, Baljeet, and Candace (who won). The chariots were destroyed when they crashed into the museum. There were no rules for the chariot race from the Flynn-Fletcher house to the museum.
"Leave the Busting to Us!"
PF ferris wheel
PF waterslide
They built a Ferris Wheel and a backyard water ride. Ferris Wheel: A laser, presumably from Doofenshmirtz, hit it and it rolled away. Candace was secretly filming them for the reality show Bust 'Em.
Water ride: A tornado from Doofenshmirtz's Gloom-inator 3000-inator sucked it up.
"Crack That Whip"
View from above the new arena
They built a roller-derby rink. Doofenshmirtz's Bread-inator hit it and then a flock of magpies ate it. Roller derby queen Grandma Betty Jo wanted a rematch with an old rival: Jeremy Johnson's grandmother.
"The Best Lazy Day Ever"
Boys relaxing
They did nothing for a whole day to try it out. Candace, annoyed at this, decided to build something herself: a giant dinosaur-themed water slide. The dinosaur came into contact with Doof's balloon and it flied the slide out of the yard. The boys initially intended to build a train, but decided to relax instead. Though Candace was supposed to have a good day of her own, she couldn't because she had been used to trying to bust them.
"Boyfriend From 27,000 B.C."
Boys with Conk
They found a caveman named Conk, and attempted to teach him about the modern world. Doofenshmirtz fell into a sandwich suit, which a hungry Conk chased away. Conk followed Candace in a cavegirl costume, who was bringing a sandwich platter to a costume party. She mistaked him for Jeremy in a costume.
"Voyage to the Bottom of Buford"
They built a submarine to help Buford find his goldfish Biff, who was lost at sea. The camera that Candace used to take photos was shorted out by the water from the water tower. It's unknown what happened to the submarine, though. Phineas used a submarine to find Biff in Danville harbor.

This is the second time Phineas and Ferb built a submarine.

"A Hard Day's Knight"
In England, the boys held a Medieval Tournament. A giant robot dragon, controlled by Doofenshmirtz, exploded and destroyed everything. Candace started out acting the part as the damsel in distress, but ended up in even more distress as the Black Knight.
"Traffic Cam Caper"
Bike with rocket engine
They built an escalator to the Moon (mentioned) and chased Norm to recover Candace's evidence. Bike: The bike took off and exploded. It took place at night and Candace was trying to use the traffic camera footage to bust them. They helped her out because they thought it would be cool to fight a giant robot.
Disk: Perry took the disc because it recorded his secret identity and had to dispose it
"Bowl-R-Ama Drama"
Boys napping
They built a giant piloted bowling ball and made the world's biggest bowling game. It hit Doofenshmiirtz's Giant Robot Penguin Icy Freeze Your Socks Off Breath -Inator Thingies and exploded. They used a giant bowling ball to break world records.
"Got Game?"
F-Games stadium exterior 1
They began a series of bizarre sports for their friends to compete in (Candace and Isabella vs. Baljeet and Buford) and created a stadium for the F-Games. Doofenshmirtz's fell into the pet shop, startling the woman holding it, who stumbled backwards and knocked over a cage with a cat in it. The cat ran into the road, causing a lorry to swerve and hit a giant globe, which rolled into a space rocket about to launch, knocking it over. It flied sideways and picked up the stadium. The boys went against the girls in a game of life-size Foosball, which took place in the F-Games Stadium.
"Comet Kermillian"
Kermillians Comet
They built the "Observa-Ferb-atory" with an enormous laser, with which they carved their faces into the passing-by Kermillian's Comet. Doofenshmirtz's heat ray made the Obseva-Ferb-atory exploded. They intended to show it to their grandchildren when it came back after another seventy-three and a half years.
"Put That Putter Away"
They built a miniature golf course and test it out with Stacy. Doofenshmirtz's Atomic Leaf Blower-inator blowed the windmill at the top, making it fly away. Candace was sick, so she relied on Stacy to bust the boys. Stacy got distracted and ended up playing with the boys.
"Does This Duckbill Make Me Look Fat?"
The teleporters
They built a real teleporter after seeing a movie. Doofenshmirtz's old Shrink-inator hit the teleport rings, turning them small enough to be replacement earrings for the ones their mother could not find. When Candace and Perry accidentally entered it at the same time, their minds switched.
"The Flying Fishmonger"
Fishmonger post-flight
They helped their Grandpa Reginald jump a gorge with his motorcycle, the Holy Mackerel. A giant shoe from Doofenshmirtz's Who's Crying Now-inator hit some dump trucks, which filled up the gorge. Grandpa Reginald requested to hear his old theme song once more, causing it to rain, making grass grow. The Mackerel was previously converted into a lamp!
"One Good Scare Ought to Do It!"
Mariachi tree
How did Django get there-
They built a haunted house to scare the hiccups out of Isabella. The haunted house was picked up by a string of Christmas lights and then destroyed by Doofenshmirtz's Disintivaporator. Before they found out about Isabella's hiccups, Phineas and Ferb created a Mariachi tree.
"The Monster of Phineas-n-Ferbenstein"
Platypus monster walking through town
Phineas and Ferb's ancestors entered a monster contest by creating a giant platypus monster. The angry mob didn't notice the monster platypus and started chasing after Constance, who had drank Jekyll Doofenshmirtz's potion, changing her into a monster. It was raining at the time, so Phineas and Ferb could not follow through with their plan to "stand alone in a field with a metal rod". Instead, their grandfather told them this story to pass the time.
"Oil on Candace"
Helicopter paint roller
They painted the "Unpainted Desert" with Django Brown to make a picture the latter made on a piece of paper. Doofenshmirtz accidentally destroyed the Danville dam, so the water rushed over the Unpainted Desert, washing the paint off. They did this for Django so he could make his father proud. In the end, the painting was washed out, but Django's father was still happy with the small painting Django did for him.
"Out of Toon"
Team Improbable
They made a cartoon about themselves and their friends as superheroes, using the Phineas & Ferb Studios. Doofenshmirtz's Dance-inator hit the studio and screen, so it got up and danced away. They were inspired by Pinhead Pierre, who asked, "If you could have any super power, what would it be?"
"Hail Doofania!"
Rainbowinator firing
They created a Rainbow-inator after Isabella pointed out she had never seen one. (She was really meaning she had never seen a unicorn) Perry the Platypus, who was wearing a scratch collar, tried to run into his lair, but rebounded off the wall and hit the self destruct button. The plan came about because Phineas thought Isabella had never seen a rainbow in real life. When she pointed out that what she wanted to see was a unicorn, Phineas told Ferb that he knew what they'd do tomorrow.

When Perry bumped into the self-destruct, Ferb commented that he did not remember putting a self-destruct button on the thing to begin with. Oddly enough, Phineas and Ferb built an "inator", while Doofensmirtz tried to start his own country. Usually, it was the other way around.

"Out to Launch"
The boys' rocket
They built a rocket to visit the stars their dad bought them on the Internet. They also built a second rocket for Candace. The first rocket: It exploded.

The second rocket: Linda reversed the car into the garage. The car was still connected to the rocket, however, so it launched back into space.

Building a rocket was featured in the Phineas and Ferb Theme.
"Phineas and Ferb Get Busted!"
Flying Car of the Future, Today
They built "The Flying Car of the Future -- Today!" They were also sent to Smile Away Reform School. While at the "school", they built a bed that was like a Ferris Wheel and had a corn dog stand toward the end. In reality, the boys never had a plan at all. The car got destroyed on the way there, then fell into a canyon and breaked. The entire episode was a dream.
"Unfair Science Fair"
Portal to Mars
They helped Baljeet get a good grade by building a Portal to Mars. Mr. McGillycuddy plugged it into a high voltage outlet and turned it all the way up to high, so it imploded. Baljeet didn't win the fair. However, he wasn't dismayed by that because he was only in it for the grade.
"Unfair Science Fair Redux (Another Story)"
Ferb talking to the Martians
They tried to rescue Candace, who was trapped in Mars. They retrieved their sister and the Martians' carving of Candace's face on Mars was blown up by Doofenshmirtz's first inator. Ferb was shown to speak Martian.

Season 2

Episode Image Big Idea Disappearance Notes
"The Lake Nose Monster"
The Lake Nose Monster Phineas petting Nosey
They built a boat to find proof of the existence of Nosey, the Lake Nose Monster. Phineas and Ferb decided not to reveal the existence of the Lake Nose Monster.
"Interview With a Platypus"
Animal translator
They built an animal translator to help all the Danville animals with their complaints, but failed to hear what Perry said (look at notes). It didn't disappear, but didn't work when Linda saw it. The plan was originally for Perry.
"Tip of the Day"
Phineas and his Aglet Awareness Ribbon
They increased public awareness of the aglet. Doofenshmirtz intended to erase an embarrassing viral video from every mind in the Tri-State Area, but accidentally erased aglets instead. This was the first time Phineas, Ferb, Isabella, Baljeet and Buford performed on stage together.
"Attack of the 50 Foot Sister"
Shrunken watermelon
They helped Baljeet win the biggest-watermelon contest at the fair with a growth elixir. The growth elixir fell into Doofenshmirtz's hands, who thought it was his dirty nappy smell and put it in his Smell-inator, causing the whole universe to grow to an enormous size. Baljeet asked Phineas and Ferb to help him because they helped him with the portal to Mars.
"Backyard Aquarium"
Backyard aquarium
They put on a backyard aquarium water show with many different sea animals. Doofenshmirtz's Hot Dog Vendor Revenge-inator hit the water, freezing it. Candace then leaned against it, causing it to slide into the ocean. The show was put on for Goldie, Phineas and Ferb's new pet.
"Day of the Living Gelatin"
They created a giant gelatin mold in Isabella's pool. The gelatin monster went down the drain, causing Phineas, Ferb and their friends to believe it'd been defeated. However, it was really Doofenshmirtz calling it. They later tried to defeat it due to the mold becoming an evil monster.
"Elementary My Dear Stacy"
Candace and Stacy riding the London Eye
They made a water slide around Big Ben and the London Eye. Doofenshmirtz's Big Ben rocket succeeded in a small take off, destroying the slide. The rocket then landed again at Perry's command. This was Phineas and Ferb's second water slide.
"Don't Even Blink"
Riding the Big Obvious Ride
They made a fun carnival ride that spined you around. Doofenshmirtz's Invisinator zapped it, turning it invisible. Doofenshmirtz later hit it with his disintegrator ray Phineas and Ferb made it for the purpose of finding out where their creations disappear to.
"Chez Platypus"
Chez Platypus
They built a trendy exclusive restaurant named "Chez Platypus", which failed to succeed for the new "Badger Restaurants". A company bought it and took it away. Their idea was inspired by a French restaurant Phineas and Ferb found disappointing.
"Perry Lays an Egg"
They found an egg they thought was Perry's and built a "Platy-posterior" in order to nurture it, but the machine was later replaced by Candace. N/A Before they found the egg their plan was to make it the sunniest day possible which didn't change anything.
"Gaming the System"
Introducing the game
They recreated a video game named "Jump and Duck" to be able to go in the video game. The final boss exited the game and crushed it. This was the first time Phineas and Ferb were severely injured, even to the point of death.
"The Chronicles of Meap"
Phineas catches the baseball
Meap's rebuilt spaceship
They fixed Meap's ship in order for him to go back home, after it crashed on earth, and defeat Big Mitch. N/A Before meeting Meap they were playing baseball with a gadget they invented that could control the ball.
"Thaddeus and Thor"
PnF fort
They built a backyard fort to see who's inventions were better. Phineas and Ferb turned the extension off to avoid zoning laws. It's unknown how they took the fort apart afterwards. The idea of a fort was bought up Linda in the Original Pitch. It also looked like Big Ben from "Elementary My Dear Stacy" with the water slide. This was the first project that Candace made the boys do to compete with Thaddeus and Thor.
"De Plane! De Plane!"
Paper Pelican
They built a huge airplane made of paper mache called the Paper Pelican. It landed in water and dissolved. Later on, When the Paper Pelican descended into the lake, it began to dissolve in the water because it is after all made of paper mache. It was made to beat the Spruce Goose.
"Let's Take a Quiz"
The boys created a game show. Doofenshmirtz's old Shrink-inator hit the set. Candace and Buford were the contestants in the show.
"At the Car Wash"
Phin-tastic Ferb-ulous Car Wash
The boys helped the Fireside Girls raise money to save the Star-nosed mole by building a car wash. Doofenshmirtz's Mountain Out of a Molehill-inator hit the molehill underneath it, causing a giant starnose mole to grow, who (ironically) picked up the car wash and walked off with it. Jeremy invited Candace for a ride through the car wash in his mom's car.
"Oh, There You Are, Perry"
Singing for Perry
Perry got relocated to a new nemesis and a new family, so Phineas and Ferb sang "Come Home Perry" to bring him home. N/A Perry was reassigned his original family and nemesis at the end of the day. This was also the first time they worry about Perry when he ran off.
"Swiss Family Phineas"
Well there is living and there is luxuary
The family and Isabella got stranded on an island, so they built a Swiss style tree-house. The nearby volcano 'erupted' with 'pink lava' (Washing-up liquid) and washed it away. Candace needed to get home in time for Jeremy's party.
"Hide and Seek"
Candance discovers the shrinking device
The boys shrunk themselves, their friends, and their new friend, Irving down to microscopic size to play an indoor game of hide-and-seek. Doofenshmirtz self-destructed one of his inventions, which happened to be near the machine. Irving was Phineas and Ferb's biggest fan. He carried a scrapbook of their big ideas with him everywhere.
"That Sinking Feeling"
The ship in the backyard
Mishti Flying
Phineas and Ferb helped Baljeet impress his childhood friend from India, Mishti with a romantic cruise. A lighthouse rocket crashed into it, making it sink. Mishti was one one of Baljeet's friends from India.
"The Baljeatles"
The Baljeatles
Phineas and Ferb helped Baljeet to rock out for Summer Rocks Camp. N/A Phineas, Ferb, and Buford became a part of the Baljeatles.
"Vanessassary Roughness"
I want to do this everyday
Ferb acquired some Pizzazium Infinionite for Vanessa, but Buford, Baljeet, Perry, Stacy, and Candace were after it too. Phineas relaxed in a massage chair. Ferb helped Vanessa get the chemical for her dad to prove herself that she's responsible.
"No More Bunny Business"
X-Ray Glasses
Candace and Dennis
Phineas and Ferb made X-Ray Specs that actually used X-Rays. X-Ray glasses: N/A. Candace found a lost rabbit and named it Mr. Cutie-Patootie.
Carrots: Perry used a giant lair entrance to make all the carrots they ordered disappear below ground when his lair was taken over by a rogue agent.
"Spa Day"
Phineas and Ferb created a spa. Doofenshmirtz's new kitten, Mr. Fluffy Pants, accidentally used Doofenshmirtz's old Destruct-inator Ray to destroy the spa. Candace and Stacy also built a house with Jeremy before they went to Phineas and Ferb's spa.
"Phineas and Ferb's Quantum Boogaloo"
Meeting Xavier and Fred
Phineas and Ferb used the time machine used in "It's About Time!" to go to the future to find a tool that hadn't been made yet. Phineas and Ferb ran into the future Candace and her kids. N/A The future Candace took the time machine to bust Phineas and Ferb for building the roller coaster. Isabella married one of the boys. They were seen doing things of the series' theme song.
"Musical Cliptastic Countdown"
Cliptastic Countown invention
Here's what I'm talkin' 'bout
Phineas and Ferb made something that we could not see. Major Monogram and Dr. Doofenshmirtz hosted a countdown of the favorite songs of Season 1. This was the first time a new project was seen, since the boys appeared for some seconds asking where Perry was.
"Bubble Boys"
Created a giant bubble that they could travel through town in. The bubble eventually popped and they landed in the park. This episode showed that Buford had a soft spot.
"Isabella and the Temple of Sap"
Isabella and the Fireside Girls got sap from a tree to help Phineas and Ferb make the bubble. N/A Ginger Hirano admited her liking of Baljeet. This happened during "Bubble Boys".
"Cheer Up Candace"
Mix n Mingler
Phineas and Ferb helped cheer Candace up with a Mix and Mingle Machine after Jeremy canceled a date. Debris from Doofenshmirtz's Perry robots caused the machine to spin too fast, destroying it. In the beginning of the episode, Phineas and Ferb built a replica of The Temple of Angkor Wat out of playing cards.
"Fireside Girl Jamboree"
Phineas and Ferb made Candace a Fireside Girl.

The previous day was their "biggest project ever" and they had to clean it up themselves. We saw a big piece with a picture of the Sun and a planet on it.

The rollercoaster disappeared when Doofenshmirtz hit it with his Metal Destruct-inator, turning it into brocolli. Candace only did it to go to a sold out concert. She really didn't need to be a Fireside Girl because Isabella could bring guests. In order to earn Candace's "Delivering cupcakes patch", the boys built their second roller coaster. (Roller coaster)
"The Bully Code"
The boys built a giant contraption that put the life of Baljeet in great peril as soon as he standed on the X, so that Buford would save his life. It didn't disappear; but Linda saw it, thinking it was public art. They did this because Baljeet saved Buford's life, so according to the bully code Buford became Baljeet's slave. Baljeet hated this, so he turned to Phineas and Ferb. Linda saw the boys' contraption but she thought it's only public art.
"Finding Mary McGuffin"
P&F in black and white
Phineas and Ferb helped Candace to retrieve her doll, which was accidentally sold off to Doofenshmirtz, then gave it to Vanessa. N/A Vanessa wanted it too. The doll was discontinued.
"Picture This"
Matter Transporter in action
Phineas and Ferb created a transporter after Ferb left a skateboard back in England. Perry used it to transport Doofenshmirtz's new invention there, which then self-destructed. They also helped their friends find lost items.
"Nerdy Dancin'"
NerdyDancin - Ferb Backstage LADTWS
Phineas and Ferb "taught" Jeremy how to dance using a metal exo-skeleton. N/A Jeremy and Candace were entered in "Let's All Dance Until We're Sick."
"What Do It Do?"
Dog shadow puppet
Phineas and Ferb figured out what an invention did using reverse-engineering. The first rocket took off after the arm that Perry used to get past the traps accidentally hit a red button. Ironically enough, it promptly fell in love with the second one and they took off together. It is Doofenshmirtz's anti-romance invention. It landed in Phineas and Ferb's front yard.
Singing about Atlantis 1
Phineas and Ferb and their friends went to the beach and found the lost city of Atlantis. When they took it to the surface with giant helium balloons, spines from Doofenshmirtz's evil plants popped them so it sinked again. Irving was included in the adventure because he went into Phineas and Ferb's car while their mom got gas.
"Phineas and Ferb Christmas Vacation!"
Bed Bobsleds
Rest stop for Santa
Christmas in Danville
Christmas accomplished
Phineas and Ferb thanked Santa by decorating Danville and making a rest stop for him. After the effects of Doofenshmirtz's Naughty-inator, Phineas and Ferb released "Danville for Niceness" to get the attention of Santa Claus. The rest house disappearED when Santa tOOK it to the North Pole and useD it as a clubhouse. It is unknown how everything else disappeared. Then they saved Christmas for the Danville area (which is a typical thing to do in a Christmas special).
"Just Passing Through"
JustPassingThrough 2
Linda lost her guitar pick, so Phineas and Ferb made an orb that went through anything and then used it to find their Mom's guitar pick. A steamroller ran it over. This invention saved Phineas and Ferb's life, by allowing a steamroller to safely pass through them.
"Candace's Big Day"
Wedding day ice sculpture
Phineas and Ferb helped throw a wedding, for Aunt Tiana and Uncle Bob. Doofenshmirtz's Junk Food-inator hit it and melted it. The ice sculpture they made, was destroyed by Doofenshmirtz Junk food-inator because the liquid was warm and so the ice melted.
"I Was a Middle Aged Robot"
Phineas and Ferb in a hot air balloon
Candace and Lawrence competed in a competition, so Phineas and Ferb and the Fireside Girls made a blimp to cheer on Candace and Lawrence. A nail from Doofenshmirtz's plane popped it. The balloon was run by the energy exercise. The balloon also included a tube-like "360-Fun Bounce" Lawrence and Linda saw the balloon, but apparently didn't care or were not aware it was built by the boys.
"Suddenly Suzy"
PF replica of Niagara Falls
Phineas and Ferb built a replica of Niagara Falls so they could ride a barrel over it and Phineas and Ferb unknowingly tried to bust themselves. Buford sticked some Tuff Gum to the top, making it stick to Doofenshmirtz's Carbon Footprint-inator. They got the idea while under the broken sprinkler and Linda mentioned that it looked "like Niagara Falls".
"Undercover Carl"
Phineas and Ferb built an Anti-Gravity Fun Launcher but Carl Karl intercepted their plans and assumed they were working for Doofenshmirtz, so he was sent undercover to figure out what they were doing and Carl helped Phineas and Ferb build the Anti-Gravity Fun Launcher and use it. Doofenshmirtz stole it after his one was taken away by the police. This was the first episode where Carl played a lead role, and he came in direct contact with the boys and their friends for the first time.
"Hip Hip Parade"
Phineas and Ferb decided to help build floats for all the neighborhood kids in the yearly "Tri-State Area Unification Day" parade. Doofenshmirtz's Duplic-8-inator hit the balloons above them the floats, so they floated away. Candace was out with Linda all day, and had promised not to obsess about the boys for the day, but seeing the parade go by made the temptation too irresistible.
"Invasion of the Ferb Snatchers"
Garbog flying to the spacecraft
After watching a sci-fi movie marathon, Candace became convinced that Ferb was an alien, but it was revealed that Phineas and Ferb built a spacecraft for Garbog, an actual alien friend of Meap's. The launch pad that Phineas and Ferb made was wrapped up in a nice little bow, because it was shot by Doofenshmirtz's Wrapped Up in a Nice Little Bow Inator.

The Linda robot controlled by Garbog disappeared after he flied off.

In the end, Ferb was not an alien, and there were logical explanations for all of her proof. For example, Candace thought she saw Ferb's head floating in liquid in a jar, but the jar only contained the liquid and Ferb was standing behind it; and when Candace thought she saw Ferb's head ripped off, but she had mistaken him for a cord in a tent.
"Ain't No Kiddie Ride"
Ain't No Kiddie Ride
Phineas and Ferb tricked out kiddie rides at a store. The rides were taken away and replaced with brand new identical ones. Candace ended up flying around town uncontrollably, and the boys and their friends had to save her. Ferb literally saved her life while she was plummeting off a cliff by doing the impossible - slingshot a quarter right into the slot on the rocket.
"Not Phineas and Ferb"
Holographic Eiffel Tower
Phineas and Ferb went to the movies, but Baljeet and Buford posed as Phineas and Ferb beside a giant hologram of the boys' Eiffel Tower construction. Baljeet: He turned off the projector. This was done for Irving's brother Albert because he didn't believe that Phineas and Ferb were anything special.
Perry: He re-shrunk the Eiffel Tower and lifted it back up.
"Phineas and Ferb-Busters!"
Tra-la-la Hey hey
Phineas and Ferb created an unlimited power supply to propel a group of cyclone-like vehicles known as "Spinning Tops of Doom." Amusement park thing: Unknown Candace could've easily busted the boys in this episode, but because she was waiting for a signal from Stacy and Jenny in the backyard (which never came; their headsets were destroyed), the tops disappeared. At the beginning they showed an amusement park type thing containing their third Roller coaster.
Spinning tops: Buford turned the power supply up to Danger, so the tops ended up flying away.
"The Lizard Whisperer"
Froyo machine
Lizard Whisperer image 1
The boys built a giant frozen yogurt machine to last them the summer, later they spied a chameleon and decided to keep him as a pet. Giant Steve: Doofenshmirtz accidentally turned on his Gigantinator Ray and shrunk Steve back to his normal size. This invention was built at the start of the episode, and quickly destroyed when Steve the chameleon grew to a gigantic size. Ferb gave a really long speech.
Frozen Yogurt Machine: Giant Steve stepped on it, crushing it.
"Robot Rodeo"
Backyard rodeo
The boys hosted a rodeo with robot bulls. The bulls were enraged by a red balloon. When the kid let go of it, the bulls chased it, taking the rodeo with them. Isabella's hair got frizzy.
"The Beak"
Flying Around Course With Grapple
The Beak
A super villain arrived in Danville to challenge Phineas and Ferb after the boys were mistaken as a superhero (while wearing an indestructible suit they designed to safely conquer their newly built extreme skate-track) known as The Beak. With the super villain wreaking havoc, it was up to Phineas and Ferb to thwart him. Skate Track: To stop flying, the Beak used his grappling hook to latch onto the skate park, knocking it down. They initially built a super skate ramp of doom. After realizing the dangers of the ramp, they built the super suit to protect themselves.
The Beak Suit: After Phineas and Ferb revealed they were the Beak, Perry used the suit to defeat Doofenshmirtz.
"She's the Mayor"
Pioneer Village
Phineas and Ferb built an authentic log cabin and a pioneer village using only their dad's antique collection of pioneer tools to do it. Doofenshmirtz's Accelerate-inator rewinded time and eventually ripped it to shreds, creating a new, alternate dimension. This was fourth time that Candace busted her brothers, though the giant time lapse that Doofenshmirtz caused by his Accelerate-inator made it never happen.
"The Lemonade Stand"
The lemon juice maker
After Candace asking them if they could think of something normal to do for a change, they built a very typical lemonade stand and began to offer franchise opportunities The robot was cut by Doofenshmirtz's Paper Cut-inator. Lemon juice poured into the cut, destroying the robot, ending the franchise. In order for Phineas and Ferb to make the lemonade, they made a giant machine that looked similar to a robot, so it could produce the lemonade. It later got destroyed by Doofenshmirtz's Paper-Cut Inator.
"Phineas and Ferb Hawaiian Vacation"
Phineas and Ferb with A-Primes
Part I: Phineas and Ferb bought Aqua Primates and used their growth elixir to make them grow to be human sized. Part I: Doofenshmirtz's De-Evolutionator, which was set on reverse, hit the A-Primes, evolving them into humans. Part I: The growth elixir was used on Candace in "Attack of the 50 Foot Sister."

Part II: They rided a large wave.

Part II: They helped Candace make it to the top of Mount Wa Ta Lot Ta Hoie. Part II: N/A
"Phineas and Ferb Summer Belongs to You!"
Phineas and Ferb built the "Sun-Beater 3000" and flied around the world in one day. The day before they made a jump roping robot. Jump Roping Robot: Not shown, but it was caught on the tail of the airplane Doofensmirtz and Vanessa were riding to Paris.

Sun-Beater 3000: It was gradually destroyed as they went along until only the seats were left.

It was the summer solstice and because it was the longest day of the year.
"Nerds of a Feather"
Fantasy vs. Sci-Fi
Phineas and Ferb headed to the Tri-State area's annual sci-fi/comic-book convention to meet their hero, special effects guru Clive Addison. N/A Their plan got sidetracked when they were swept into a duel between fantasy fans and sci-fi geeks.
"Wizard of Odd"
Cleaning the House
Phineas and Ferb cleaned the house by spinning it. They later built a giant unicycle. During the dream, they built several alternate routes for Candace, but she refused to go on any of them.
"We Call it Maze"
The Labyrinth
Phineas and Ferb built a challenging labyrinth in their backyard. Doofenshmirtz's Tilt-inator caused it to roll away. However, Doofenshmirtz's invention made the labyrinth rolling away.
"Ladies and Gentlemen, Meet Max Modem!"
Max Modem Entrance
Phineas and Ferb decided to turn his father into "Max Modem", an unknown singer from the 80s. N/A Lawrence felt depressed because his wife was going to forget him because she would meet exciting and fun people.
"The Secret of Success"
Phineas and Ferb's All Terrain Vehicle
After watching a commercial for an all-terrain vehicle, Phineas and Ferb built a better model - one that could drive on literally any type of surface. Ferb activated Rocket Mode and flied to the Moon. The truck turned into a rocket and flied away before Linda saw it.
"The Doof Side of the Moon"
Phineas and Ferb's Building
Phineas and Ferb decided to build the "World's Largest Building" in order to make Danville more popular. Doofenshmirtz's Lunar Rotate-inator hit the Moon, which the building was attached to, causing it to fly away. Doofenshmirtz's invention drove it away.
"Split Personality"
I gotta show this to mom!
Phineas and Ferb created a machine that splited an object into its components, but their cover was blown with Candace and her double one. Candace accidentally stepped on a rock, which really activated Perry's lair entrance, which the Molecular Separator was stood on. They had to get the two Candaces before they got in trouble.
"Brain Drain"
Phineas, Ferb, Isabella and Baljeet were in bed because they were sick and they, along with Buford, played video games that let them compete against another friend. N/A Later, they accidentally got the video feed from a junkyard rave where Perry and Doofenshmirtz were fighting. They all controled a part of Perry, to fight Doofenshmirtz, thinking it was a Perry based level in the game.
"Rollercoaster: The Musical!"
Rollercoaster the Musical
Phineas and Ferb built their rollercoaster from "Rollercoaster" again, but this time, as a musical. Same as "Rollercoaster." This was the fourth rollercoaster they'd built.
"Make Play"
Phineas and Ferb built a huge jukebox after Lawrence told them about it. Doofenshmirtz's Super-Claw-inator picked it up and took it away. The jukebox was afterwards used at the opera house.
"Candace Gets Busted"
Not their party
After Candace's "intimate get together" turned into a house party, they ate potato chips while a crowd cheered them on. Doofenshmirtz's Go-Away-Inator took away the party, but Perry set the ray to reverse and brought the party back to the backyard. Candace asked Phineas and Ferb to stay out of the way, so they didn't do anything.

Season 3

Episode Image Big Idea Disappearance Notes
"The Great Indoors"
They built a Bio Dome in which they could change the climate. Doofenshmirtz's Rain-inator knocked it like a golf ball. They got the idea from the Fireside Girls who wanted to earn certain outdoor patches.
I can't believe how fast we rebuilt this
They built the Robot Dog from the Title Sequence and named it Rover. They also rebuilt their Molecular Separator to separate Candace from Jeremy. Rover: They took the wiring out, turning him off.

Molecular Separator: Rover dropped and destroyed it.

They had to capture Rover to retrieve the molecular separator.

The separator was from "Split Personality."

"Run, Candace, Run"
Ferb on Treadmill
They made two pairs shoes which would allow them to run faster than a cheetah. N/A They took tests and concluded they could run faster than race cars and sound, but not light.
"Last Train to Bustville"
Hot air balloons
Looks like a dead heat so far
They had a hot-air balloon race. Buford/Baljeet: Buford threw a model marlin out, which rebounded off a branch and bursted the balloon.

Isabella: She somehow managed to get into Phineas' balloon, leaving hers to crash. Phineas/Ferb: They were stolen by Doofenshmirtz and the dodo attacking him.

They finished at a train station.
"Phineas' Birthday Clip-O-Rama!"
Phineas Birthday Clip o Rama promo shot
Phineas followed his brother's clues for a scavenger hunt. Meanwhile, Ferb, Isabella, Buford, Baljeet and Irving hosted Phineas's birthday party and made a clip show. There were many ways the disc Candace took would've been gone, in the end Candace destroyed the disc herself with a wrench since she couldn't bust her brother on his birthday. Candace prevented herself from busting Phineas, since it was his birthday. The clip show for his birthday was not mentioned after act 1.
"The Belly of the Beast"
Mechanical Shark carried by helicopters
They built a robotic shark. Doofenshmirtz's Salt Water Taffy-inator broke, sending out a string of taffy, which attached to the shark and pulled it underwater. They built it because they thought the other model the harbor made wasn't realistic. Candace and Stacy ended up chasing it.
"Moon Farm"
Rocket (Moon Farm)
Moon Farm Image3
The boys decided to take some cows to the moon to see if its low gravitational pull actually did produce the best tasting ice cream ever. A cow accidentally hit the rocket's take off button, so it went back to the moon. Inspired by the lost verse from the nursery rhyme, "The Cat And The Fiddle."
"Ask a Foolish Question"
They built a super computer to ask it what they should do for their mom. Doofenshmirtz's Metal Unearth-Inator magnetised it and took to his lair, then all the inventions exploded. Candace asked it how to bust Phineas and Ferb.
"Misperceived Monotreme"
Everyone in the funhouse
They built a fun house inside their own house. Doofenshmirtz's Least Likely-inator hit Candace, who cleared everything up. Candace was the one who cleaned it up, after being hit with an out-of-character ray.
"Candace Disconnected"
Candace Disconnected Image6
Candace disconnected pic6
Phineas and Ferb created a new super-phone for Candace after her old one broke. The First Phone: A bird took the phone to its nest.

The Second Phone: N/A Unseen structure: The museum guy took it.

Unbeknownst to her, the phone that they invented for her had a voice activated phone transfer app that sent her to Easter Island.
"Magic Carpet Ride"
Aerial Area Rug
Inspired by Dad's favorite childhood program, the boys decided to create a magic carpet. A pellet from Doofenshmirtz's Stain-inator hit the rug, turning it to a different color when they landed. The magic carpet was built-in to the ground.
"Bad Hair Day"
Bad Hair Day Image10
They built a hair growth machine when some of Candace's hair fell out. N/A Candace set the growth rate too high, which resulted in her being mistaken for an orangutan.
"Meatloaf Surprise"
Meatloaf Surprise Image19
The boys built a bounce house in their backyard after the one at the meatloaf festival broke. Buford popped it to annoy the little kids. Buford brought it to the little kids as a gift, but then popped it.
"Phineas and Ferb Interrupted"
With These Blueprints
Phineas and Ferb Interrupted Image150
They had boring conversations all day, as they were hit by Doof's Dull-inator. They eventually built a slide to save Candace. N/A They also built a mini-rocket box.
"A Real Boy"
Spring thing
They built a jumping machine that launched at random moments. It didn't disappear, but Doofenshmirtz's Forget-about-it-inator made Mom forget about it, and she then said "Holy Guacemole!" causing Candace to stop. The machine did not disappear at the end of the episode.
"Mommy Can You Hear Me?"
Birthday machine
They tried to wish Happy Birthday to a astronaut called Sergei Kushnarov. An asteroid, rerouted by Doofenshmirtz's Chicken Soup-Inator, destroyed it. An alien Ferb got to wish an old Sergei Happy Birthday.
"Road Trip"
No Stop Truck Stop
When they were on a road trip, they built a "No Stop Truck Stop" restaurant on the family truck. They drove under a bridge and the restaurant came off. When they drove under a bridge the restaurant got on the bridge.
"Tour de Ferb"
Tour De Ferb song HD
The boys made a bicycle race track and made custom bikes to race with. The Popup-inator blocked off Candace's evidence. Baljeet overcomed his fear of bike racing.
"Skiddley Whiffers"
SW - Slider
They made a new version of their childhood game "Skiddley Whiffers" Candace tripped on the victory bell, and the dice slipped off her hands and it landed in the shoe, the cube went haywire and made all the games pieces advanced. Candace loved the game.
"My Fair Goalie"
Soccer Bio-dome
They built a Football X-7 stadium after Ferb's English cousins challenged they challenge them to a football (soccer) match. They gave it to the Snifferton Nostrils. Ferb disappeared right before the match because he thought he was under the "Emu Curse."
They built a giant game of darts across town. Candace thought that her mom's art project was the invention, and missed the real invention. They kept hitting the target right about the outer ring, but Perry redirected their path and the hit the very center of a target-shaped pattern on the L.O.V.E.M.U.F.F.I.N. pageant.
"That's the Spirit"
They helped their new friend Russell "bust" some ghosts, because he thought his house was haunted. N/A The whole ghost gig ended up to be a Halloween trick.
"The Curse of Candace"
They built things at their friends' request. (They built a non-reflection mirror, an anti-gravity dumbbell, hidden air jets, and a plant growth lamp.) Candace watched a scary movie, ran into their creations, and thought she was a vampire.
"Escape from Phineas Tower"
Go to tower2
They built a extremely high tower and locked themselves in so they could experience the fun of escaping. It flied to the edge of the Milky Way galaxy and encased the whole thing. It became self-aware and tried to trap them.
"Lotsa Latkes"
The Spudsalot
They made a machine for making potatoes using a potato chip's DNA, but instead, they made an army of mutant potatoes, since Buford's DNA was mixed in.. Doofenshmirtz's Historical Army-inator reversed and took the machine back in time. They built this because they had to make the potatoes because there were no potatoes in the Tri-State Area.
"Ferb Latin"
Ferb latin song 05
They made up a language that everyone in Danville started to use. Norm adopted it. Doofenshmirtz didn't understand him and told him to talk normal, accidentally producing 'Talk Normal' pamphlets. Doof pushed Norm's red button for normal talk
"A Phineas and Ferb Family Christmas"
We wish you a merry christmas 35
They hosted a classic family Christmas special... in Summer Doofenshmirtz's Transport-inator took the set away. The special had guest stars and some songs.
"Tri-Stone Area"
Phinebunk and Gerb's new wheel
The prehistoric car
In 27,000 B.C., Phinabunk and Gerb (caveman versions of Phineas and Ferb) invented a wheel and they invented new car-like vehicle constructed with rock and wood. A herd of stampeding mammoths destroyed it. At the same time, Doofengung used his Stick-inator on one of the mammoths, though his plan backfired as the mammoths turned around and chased him. As Doofengung ran past Phinabunk and Gerb, the mammoths stampeded over the vehicle, completely crushing it before "Mog" could see it.
"Doof Dynasty"
Baljeet has two right hands-
PnF Doof Dynasty
Images (63)
Phineas and Ferb found Master Perry to teach them the way of the platypus and rescue Princess Isabella. The terracotta warrior they used to defeat Doofus Kahn eventually fell to the ground and crashed. Took place in ancient China.
Medival Alchemists
Phineas and Ferbalot went on an epic quest to find the legendary sword, Excaliferb to defeat Malifishmirtz. N/A Took place during the story in a book.
"Phineas and Ferb and the Temple of Juatchadoon"
322b - Shattered Glass
Ohio (Phineas) Flynn and Rhode Island (Ferb) Fletcher ventured with Isabella to find her missing mother and find the lost Temple of Juatchadoon. Candace took pictures of the whole quest, but her camera was all washed up (literally). This episode took place during the summer of 1914.
"Monster from the Id"
They built a Mind machine to go deep into Candace's subconscious to retrieve how Jeremy's gift looked like. Baljeet took off the cables of the machine. Originally it was going to be used for Baljeet.
Built the Antius Maximus, to wonder how it would be like living as ants. Doofenshmirtz's Turkey-inator hit the Antius Maximus and the now enlightened ants brought it with them to outer space. Candace was made the ant queen due to excessive ant pheromones.
"The Remains of the Platypus"
Cheese-topia revealed
Phineas and Ferb built Cheesetopia and a Celebration seeking rocket Celebration seeking rocket: Launched and traveled to Doofenshmirtz's party.

Cheesetopia: Doofenshmirtz's Vaporizor-Inator hit Cheesetopia.

This episode started from the end and worked its way back to the beginning.
"Mom's in the House"
Perrytronic in space
Phineas and Ferb built the Perrytronic-3000 Doofenshmirtz Duplicate-Inator 2 hit the Perrytronic-3000 resulting in two Perrytronic-3000's, one hit the tail of the other and they somersaulted out of the backyard. Candace did a "B.B. Busting" technique where she tried to stop the kids from finishing the invention so it didn't disappear, yet that failed.
"Perry The Actorpus"
Stop the busting machine
Phineas and Ferb entered Perry into a company contest and Perry was crowned winner.

Positive Reinforcement Machine that Mandy used.

Totally Tools Sponsor: Perry used Doofenshmirtz Mustache-Inator and hit every advertisement with it, causing them to be replaced with Sergei the Snail.

Positive Reinforcement Machine: Candace angrly destroyed it after learning Phineas and Ferb made it.

Perry's picture on the billboard made him too recognizable to be a secret agent.
"Let's Bounce"
Zero G bouncing
Anti-Gravity Maximus and Trampolines Doofenshmirtz Tell-the-truth-Inator flied around aimlessly and caught all the trampolines and the Anti-Gravity Maximus. Doof also made an Abe Lincoln robot to match the theme of his scheme.
"Bully Bromance Breakup"
Phineas cracky2
Phineas and Ferb assisted Baljeet in climbing the Danville Mountain.

Phineas and Ferb built an ice chalet

Phineas's ice chalet was destroyed when the mountain, sculpted into Doofenshmirtz face, crumbled. Phineas and Ferb almost went insane because Baljeet didn't let them build.
"Quietest Day Ever"
PnF Ninjas
Phineas and Ferb created ninja suits that hided the wearer from anyone not wearing a suit. Removed their ninja suits, then turned it on, making their suits put themselves away. They also made one for Candace.
"The Doonkelberry Imperative"
325a - Ready to Go Home
325a - The Trebuchet
325a - Warping Space-Time
325a - Sawing the Shaft
Phineas, Ferb and Isabella went to Drusselstein and found some Doonkelberries for Doonkelberry pie and helped fix Drusselstein's major powershaft. They also built a catapult and a warp generator to bend the fabric of space-time and make areas of the world closer together. Candace leaned on a button of an inator at Doofenshmirtz Evil Inc. while looking for a book, making the catapult dissapear. Baljeet turned off the warp generator while Dr. Doofenshmirtz was slingshoting himself, so he fell in the ocean.
"Meapless in Seattle"
327 - Giant Pillow Fight Machines
The boys' "Cute-tracker" leaded the gang to Seattle and an adventure to save the universe. They also built giant pillows for giant pillow fight. Giant pillows were pulled up by Mitch's machine. Originally a fake Big Idea, but was later made into a real one.
"Delivery of Destiny"
Phineas and Ferb built city-wide amusement park on a single track. Doofenshmirtz's Juice-inator hit their one track amusement park, turning it into juice. N/A
"Buford Confidential"
PAF BC copy
Phineas and Ferb built an underwater water slide. None, but Doofenshmirtz's De-twist-Inator straightened it out.
"The Mom Attractor"
The Mom Attactor
Phineas and Ferb built a Mom Attractor. Doofenshmirtz's Baby-Cry-Inator made the Mom Attractor run to the giant crying baby. Candace asked Phineas and Ferb to make the invention.
"Cranius Maximus"
CM Giant Pants
CM Big Brain Yeah
CM Stop Baljeet
Phineas and Ferb invented a cerebral stimulatory hat, or "Brain booster" to help Baljeet. Buford's wedgie machine pulled Baljeet's machine and the Brain Booster into space. Phineas and Ferb didn't construct the invention in this episode, but Baljeet did.
"Agent Doof"
322a - Tricked Out Stroller
As babies, Phineas and Ferb upgraded their stroller with a motorbike. N/A Phineas and Ferb were turned into babies thanks to Doofenshmirtz's Babe-inator.
"Minor Monogram"
319b - Rapid Leaf Production Accelerator
319b - To the Top
S'Fall (Combination of Fall and Summer) One of Doofenshmirtz's propellers blowed all of the leaves away. Second time Phineas and Ferb combined two seasons
"What A Croc!"
The Gang on Jetskis
Phineas and Ferb attempted to find Crikey the crocodile. Crikey ate Irving's UPAFDS, causing Candace to lose the evidence.
"Sci-Fi Pie Fly"
326b - Lift-Off
Phineas and Ferb built a spacecraft to investigate crop circles. N/A Candace took a "Me Day" and did not bother to bust them.
"Sleepwalk Surprise"
326a - Ginger Hits It
They played volley ball with jetpacks. Doofenshmirtz's Cupcake-inator turned the ball into a cake, then the Hug-inator made the net hug the jetpacks, then the Confetti-inator turned the net and jetpacks into confetti. Candace tried to prevent Linda from seeing them due to Jeremy joining them.
"Sipping with the Enemy"
329a - Mind Flip Performers
Phineas and Ferb put on an enormous backyard magic show. Phineas made the whole stage disappear as the final act, and the parents were turned hip by the Cool-inator, making them ignore Candace. N/A
"Tri-State Treasure: Boot of Secrets"
Escaping with the Treasure
Phineas and Ferb helped their father unearth a missing piece of Danville history when they ran into his lifelong nemesis Worthington at a flea market. Didn't disappear, but Phineas and Ferb made a short movie of their adventure.
Phineas and Ferb created The State-of-the-Matter Transfer Device to turn anything into liquid so they could have instant smoothies. The Double-Inator hit their device, doubling it, and they hit each other, turning both into liquid piles. The State-of-the-Matter Transfer hit Candace, making her liquid.
"Norm Unleashed"
Candace and the Nanobot Copter
Phineas and Ferb built nanobots that they could assemble into any object they imagined. Didn't disappear, but a squirrel hit the remote, dissassembling the nanobots before Linda saw it. Corresponded with the theme song.
"Where's Perry?"
Phineas and Ferb built a highly unconventional vehicle to explore an unchartered gorge. As it fell, it crashed. Then Doofenshmirtz, Major Monogram and Carl picked it up cleaning the robotic parts with the Magnet-inator, as seen in the second part. Buford broke the machine, making the boys to fall to the gorge.
"Ferb TV"
Phineas and Ferb showed Candace what they came up with for television shows. Unnamed inator disappearance receivered to Ferb TV. N/A
"When Worlds Collide"
Images (55)
Phineas and Ferb observed an incoming planet and used a spring to push the planet into space. The spring got attached to the planet and was pulled along with it. Candace couldn't try to bust them until mindnight because she already failed alltogether once today. This took place immediately after "Gi-Ants".
"What'd I Miss?"
Phineas and Ferb taught domesticated squirrels how to be wild again. A water droplet hit the backyard, and using the little surfboards, the squirrels surfed out of the backyard. Candace successfully told the story, but the activity was not considered bad. The Big Idea took place the day before the episode. Ferb didn't know about this because he was at Debate Camp.
"Road to Danville"
Tumblr mc6jc5vSU11r8ndmgo1 500
Phineas and Ferb with the rest of the crew decided to create a quilt. N/A Candace most likely did not bust her brothers due to their activity being, as Candace would dub it, 'Non bustable'.
"This Is Your Backstory"
Just Regular Old Ping Pong
Phineas and Ferb played ping pong to store enough kinetic energy to create a quantom vortex. Sucked in itself N/A
Candace wrung trough the wringer
They built a unknown device to have the best blackout ever. A Jetpack Squad took it to give it to Doofenshmirtz. Exactly what they built is unknown. However, Candace accidentally rode it.

Season 4

Episode Image Big Idea Disappearance Notes
"For Your Ice Only"
Hockey field
FYIO Everyone say Canadian Bacon
Hockey z9
The boys created Hockey Z-9. An ice resurfacer hit by Doofenshmirtz's Abominable-inator cleared the Z-9 course away. This was similar to Football X-7]] from "My Fair Goalie".

They saved the name "Y-8" for croquet.

"Happy New Year!"
The New Years Ball
The boys planned their own New Year's Eve ball drop, complete with a customized multi-dimensional ball. Ferb launched the ball into outer space, and it exploded into fireworks. This was inspired by Vivian, who wanted to stay up and watch the ball drop. The ball drop was also inspired by the Times Square Ball Drop in real life.
"Fly On the Wall"
A Tire Swing
Sundae Machine
A giant tire swing Buford pressed a red button that readed "FLY", and it went up into the sky. When the tire swing disappeared, Phineas moved a certain lever and it became a sorbet machine.

If a certain lever was pulled, it would emit a beam that would turn a human (specifically Candace) into a fly.

"Bully Bust"
Dental hygienosphere
The Dental Hygienosphere, a tooth-themed amusement park ride Doofenshmirtz' ray picked up the ride and pulled it into orbit; when the ray shut off, the giant tooth fell on the top of Doofenshmirtz Evil Incorporated. The ray pulled Buford up with the ride.
"My Sweet Ride"
Tumblr mh7ttwrNoE1rmra37o1 500
The boys restored and tricked out Lawrence's old car for Candace. The car didn't disappear, in fact, Linda and Lawrence saw it but they thought that was Lawrence the one who made it. The car won Best in Show at the Doo Wop Hop.
"Der Kinderlumper"
Rutabaga vehicles
The boys created rutabaga-themed vehicles for the Running of the Chinchillas. The vehicles were trampled by the over-sized chinchillas. All the kids were also trampled, but unhurt.
Phineas asking where Perry is in the episode Sidetracked
The boys built a metal superstructure. Not seen, but the superstructure was carried away by a magnetized cloud. The invention was not seen in the episode.
"Primal Perry"
Infinite probability generator
Baljeet had problems with making the right choice, so the boys made a machine to help him. Liam's giant Boomerang destroyed the machine thus reverting Baljeet back to only himself. When Baljeet had to make a choice he would be copied into two Baljeets and then three Baljeets and so on.
"Mind Share"
Mind Share title card
The boys built a mind share device Satellite: N/A

Mind Share Machine: Morg and his friends made it self-destruct.

After seeing a commercial of Morg in taking a vacation into another planet.
"Backyard Hodge Podge"
Hodge Podge invention revealed
They made an invention out of recycled parts. Didn't disappear, but Candace couldn't see it clearly when zapped by Doofenshmirtz's Eye Fog inator while Linda thought she was hallucinating. The invention used parts from past ones.
"Bee Day"
Giant wading pool
Phineas and Ferb created a giant wading pool for their Mom and friends. The pheromones ended up landing on the giant wading pool, and the swarm of bees, attracted to the pheromones, lifted the whole thing into the air. The bees popped the pool. As Candace's old wading pool, the only part unaffected. Inspired after Linda seen some kids playing in a wading pool.
"Bee Story"
Bee Story-Isabella and the sorbet machine
Isabella borrowed the sorbet machine that would turn her and the Fireside Girls into bees. Did not disappear, but after a few hours the effects weared off and they became themselves again. The Fireside Girls needed to earn their Bee Keeping Patch.
"Great Balls Of Water"
The gang having fun
They made a giant water ball. The water ball hit a prickly sphere, causing all the water to be released into a hole. Inspired by Baljeet in physics camp about water surface tension.
"Where's Pinky?"
I can smell the future
They amplified Buford's senses to those of a dog. Buford ran into the City Hall, where he eventually took it off. Don, a City Hall tour guide was later seen running out of the edifice with the helmet on. Inspired by Isabella, who had lost her dog.
"Knot My Problem"
Gordian Knot
They made a giant replica of the Gordian Knot. Candace was zapped by the stray gun of Doofenshmirtz's All-You-Can-Eat-Buffet-Inator, causing her to eat the entire project. N/A
"Just Desserts"
The kids started climbing
They created a giant rock climbing wall out of lawn clippings. A swarm of bent-bill knot-hatches picked the wall for nest material, demolishing it.
"La Candace-Cabra"
We present to you, the cupra-copter
They set off to search for a rare Chupacabra by using their Chupa-Copter. The Chupacabra was actually an animal agent, Agent CH, so Perry used the Switch Place-inator, making it switch places with Buford, and it flied away on the Chupa-Copter. Inspired by Buford's grandfather hunting the Chupacabra.
"Happy Birthday, Isabella"
Birthday for Isabella revealed
They threw a birthday party for Isabella. Didn't disappear, but the grand finale got turned into butterflies. The grand finale was not seen, but part of it was mentioned (laser light show and swans).

All Isabella wanted for her birthday is to be alone with Phineas.

"Love at First Byte"
The boys created a laser light show for the grand finale of the block party. Norm's head clinged to the PHLASER and flied off to space before it was scheduled to do so. N/A
"One Good Turn"
One Good Turn
Isabella, Ginger, Buford, Baljeet, Candace and Stacy competed in an event created by Phineas and Ferb. Didn't disappear, but the jumbo-tron with Phineas and Ferb got zapped with Doofenshmirtz's 90-Degree-Turn-Inator, causing it to block Linda's view of the entire project. For doing this project, Phineas and Ferb used the leftover building materials that remained after making the invention in Backyard Hodge Podge.
"Phineas and Ferb: Mission Marvel"
Surfing Asteroids
Candace and isabella headed up to the space station
Mqdefault (54)
The heroes getting their powers back
In the beginning of the special, Phineas and the gang used the satellite from their space-station to power up their rocket-powered surfboards to surf the asteroid belts. Later, they built a Secret Hideout for Emergency Defense (or S.H.E.D. for short) full of machines to help the Marvel superheroes get their powers back. It was never explained what happened to S.H.E.D., but Candace accidentally made the space station crashed down to Earth, and Doofenshmirtz disintegrated it with his Disintegrator-inator. N/A
"Thanks But No Thanks"
The boys created a series of pyramid-related sports. N/A
"Troy Story"
Isabella and Phineas in a chariot
Trojan War
Screen Shot 2013-08-25 at 1.22.47 PM
Phineas and Ferb recreated the Trojan War. The flying chariots got tangled up with the Trojan Dinosaur, and they fell onto the castle, crashing everything. Later, Lawrence got zapped by Doofenshmirtz's De-Clutter-Inator, causing him to clean up the wreckage. This was originally supposed to be the big idea in "I Scream, You Scream", but was cancelled due to Isabella having her tonsils removed.
"Druselsteinoween" Haloween party in Drusselsteinian castle
The boys did a castle Halloween party N/A N/A
"Terrifying Tri-State Trilogy of Terror"
Armed with bubble washers
They accidently made evil platypus clones by pouring grape juice on Perry, so they used bubble washers to take them out. The entire adventure was a story.
"Face Your Fear"
A view of foam town
The boys created "Foamtown" as a safe place to skateboard without having to worry about getting hurt. The bat Derek flied through "Foamtown" multiple times causing Doofenshmirtz's head to hit it time and time again, eventually causing the giant bolt to come out and foamtown to roll away to the desert. N/A
"Cheers for Fears"
Scrapbook-aganza page 5
They made the Scrapbook-aganza, a giant scrapbook with Candace and Jeremy's moments, as a present for Jeremy's birthday. Candace got hit by Doofenshmirtz's Worst-Fear-inator, making her state her worst fear is that the Scrapbook-aganza would fly away before Jeremy arrived. It did exactly that. Candace couldn't figure out what to get for Jeremy, so she asked Phineas and Ferb to make this.
"Just Our Luck"
The stating point for sky tennis
Phineas and Ferb decided to create Sky Tennis. After the effects of the Stinklekrampen-Inator weared off due to Perry destroying it, the contraption sank into a crack in the Earth after Candace said that it was not like this would happen. The idea of Sky Tennis was similar to that of Jetpack Volleyball from the episode "Sleepwalk Surprise".
"Return Policy"
Extreme batting cage
Phineas and Ferb created the ultimate baseball challenge. After Buford hit all the levels in the cage and the ball went into the target, jet packed come out of it and carried the ultimate batting cage away and then the cages were launched into the air and exploded into fireworks. Phineas decided to create the ultimate batting challenge after Baljeet mentioned that hitting a baseball involves the basic principles of velocity, force, and geometry.

They also made a giant water slide at Aqua Maximus.

"Live and Let Drive"
Lald035 seriously, they're enlarging DNA
Lald039 who's giant foot is that
The big idea was only reduced to a Funny Background Event, but it somehow involved getting DNA out of a pool, and a giant human foot. N/A N/A
"Phineas and Ferb Save Summer"
We're joining you to celebrate around the world
Phineas and Ferb made a tribute-to-summer concert and also saved it. N/A N/A
"Father's Day"
S04E21 Samolot
Phineas and Ferb built a biplane for his father. Didn't disappear, but Reg flied it away before Linda and Candace returned. N/A
"Imperfect Storm"
You start by blowing a bit of wind
Phineas and Ferb made a wind machine to fly enormous kites. A storm hit and the kites were destroyed. N/A
"The Return of the Rogue Rabbit"
They helped the fireside girls with their puppet show N/A Agent P later used it to fight Dennis the Rabbit.
"It's No Picnic"
Picnic Power!
The boys constructed picnic-themed amusement park in Danville Park. The entire thing and the people there (except Isabella and Phineas) were sent home by the Transport-inator. Isabella was trying to make use of a day when Ferb had a dentist appointment to spend time alone with Phineas, but failed after Ferb was hit by a ray from the Transport-inator, sending him back to the backyard.
"The Klimpaloon Ultimatum"
Klimpaloon, Phineas and the gang
They tried to help Love Händel to find Klimpaloon. N/A N/A
"Operation Crumb Cake"
The boys constructed a large art piece out of various things in their kitchen drawers. Phineas came into contact with a beam from the Un-Retrograde-inator and he undid the crestion. N/A
Phineas and Ferb created a machine for change the smell of the air. N/A N/A
"Phineas and Ferb: Star Wars"
Phineas holding the Death Star disk
In a galaxy far far away from Summer, the counterparts of Phineas and Ferb tried to return the blueprints of the death star to the rebels.

During the "Tatooine" song they also fixed evaporators, trained rats and did several things.

Didnt dissapear, by the way, they returned the plans. This episode happened during the events of A New Hope.
"Lost in Danville"
A mysterious capsule fell into their yard and they accidentally released a black hole when they opened it. A ray from the Unexist-inator hit the black hole, which had already sucked in the capsule and its residents. This adventure was set in another reality; at the end of the episode, the original Phineas and Ferb were watching the whole strange scene through a portal from the sorbet machine that turned people into flies and bees.
"The Inator Method"
Baljeet after winning the digital trophy
The boys made a planet race. A man bought the race track. N/A
"Night of the Living Pharmacists"
The gang by the Rubberization Ray
Phineas and Ferb built a Rubberization Ray and used it to give their skin rubber like qualities. The Doof Zombies destroyed the Rubberization Ray. The entire episode was a horror movie that Stacy was watching.
"Tales from the Resistance: Back to the 2nd Dimension"
Discovering Sports
The alternate version of the boys played sports and they also tried to rescue Perry-2 N/A This episode happened in the 2nd Dimension
"Doof 101"
Phineas and Ferb made modifications in their school yard. N/A This episode happened after Summer Vacations.
"Act Your Age"
Fireside Girls, Ferb and Baljeet admire their romantic dinner
Toddler Phineas and Isabella in backyard
Preschooler Phineas and Isabella in backyard
Kid Phineas and Isabella in backyard
Tween Phineas and Isabella in backyard
The teen Fireside Girls, along with Buford and Baljeet, set up a romantic dinner to set Phineas and Isabella together. Also, in a flashback montage, Phineas was seen building a giant robot as a baby, a popcorn machine as a youngster, a generic machine at about the same age he was in the main series, a oversized could opener as a teenager, and a giant robotic eggplant as an adult. The date was taken away by a rolling dumpster. This episode happened ten years in the future.
"Last Day of Summer"
First incarnation of the last big idea
Phineas and Ferb tried to seize the last day of summer by doing "everything".

Then they used a machine to get back in time.

There were so many ways it went, they are unknown, but Phineas and Ferb ended up being erased from existence. The last Big Idea.
"The O.W.C.A. Files" N/A N/A Phineas and Ferb only appeared in the credits.


Episode Image Big Idea Notes
Camp Rock 2: The Final Jam
Its On
Phineas and Ferb directed the Summer version of the music video "It's On" from "Camp Rock 2: The Final Jam" kicking off Disney Channel's Summer Vacation. The first time crossover meet Cast of Camp Rock 2: The Final Jam.
Phineas and Ferb The Movie: Across the 2nd Dimension
Platypult ready to be used
The boys made a platypult to play badminton with Perry. Then they went on a grand adventure through a parallel universe with Agent P in agent form and tried to defeat Alternate Doofenshmirtz. To save the Tri-State Area, Phineas and Ferb recreated many of their previous inventions to fight off the Norm-Bots. The platypult was the only new big idea to appear in the film. The previous big ideas were piloted by the kids of Danville.
Community content is available under CC-BY-SA unless otherwise noted.