Making a Deal with the Enemy

In some stories, the heroes or heroines has to make a deal with the enemy or someone who works for the enemy. Later in the story, the hero goes back on the deal or keeps it.

This is often a result of working undercover with the enemy or trying to protect them for their own good.

Here's why they make a deal with a villain:
 * by protecting their love ones
 * sacrifice their own choice
 * decide to give up for being good and want to be evil for no reason
 * decide to give up their own lives and be something that they're not

Examples

 * Hercules gives up his strength for Meg's safety.
 * Itachi make a deal with Madara (whom actually Obito whom works as Madara's executor) to help him slaughtered Uchiha clan whilst sparing Sasuke.

Quotes
"Gentlemen, today I have proven that man can break the 50 mph speed barrier without disrupting his internal organs. (Lord Kelvin: Where is your Royal Academy of Science authorization?! Oh, what am I thinking? What a fool. That would mean that you are a real scientist!) (Everyone laughs.) By your definition, Kelvin, a real scientist's objective would be to prevent man from progress. (Lord Kelvin: We live in a golden age, Fogg. Everything worth discovering has been discovered. Yet ridiculous dreamers like you insist on a past filled with "dinosaurs" and "evolution" and on a future filled with "motorized vehicles", "radio waves" and "flying machines". (Colonel Kitchener: (enters the room and interrupts) Confound it! The b****y Bank of England is a madhouse!) (Scientist #1: (whispers in Passepartout's ear) Rumour has it that it was a foreigner, an Asian chap.) (The whisper passes on.) (Scientist #2: Yes, I heard it was a Chinese fellow and he acted alone.) (Passepartout whispers again.) (Lord Rhodes: Uh, no, actually, they say he was Norwegian.) (Passepartout whispers again.) (Scientist #3: In fact, it was a gang of elderly Norwegians.) (Scientist #4: Yes, I heard from a very reliable source that it was a gang of red-headed elderly Norwegians with very tiny feet.) (Everyone laughs, especially Passepartout.) Well, if you ask me, it's about time someone robbed that bank. (Everyone gasps in anger.) Like this very institution, the Bank of England is outdated! (Lord Kelvin: As usual, Fogg, your contempt for tradition is appalling.) You rest on your "traditions" if you prefer, but as with this bank robber, progress waits for no-one. (Kelvin: Oh. So now you're an expert on the bank thief as well? Give us the benefit of your "ineffable wisdom", Fogg.) (Fogg gets out his pocket watch.) 26 minutes ago, a ship left Dover for Paris. From there, the thief takes the Orient Express, where he transfers to a steamer from Istanbul to India. In little over a month, that man could be in China. (Passepartout thinks for a moment) (Lord Salisbury: If we're to believe Fogg's "calculations", he will have circled the globe and returned to England in a fortnight!) (Everyone laughs, even Colonel Kitchener.) Actually, by my calculations, it would be closer to...exactly 80 days. (Passepartout whispers in a scientist's ear, who passes it on, until it reaches Lord Kelvin.) (Kelvin: Outstanding idea.) (Passepartout smiles.) (Kelvin: Well then, Fogg, let's see you circumnavigate the world in 80 days.) I...That would be a fruitless use of my time. I'm on the verge of...numerous, countless...scientific breakthroughs. (Turns to go.) (Kelvin: You coward! Admit it, it cannot be done.) (Fogg stops and turns round.) It CAN! I can do it. (Kelvin: A wager. £10,000!) Unlike you and your colleagues, money does not inspire me. (Kelvin: I believe every man has his price. Even you, oh noble Phileas Fogg. There must be something I could offer that would be worthy of your time.) There is. Your position as head of the Royal Academy. (Kelvin frowns and everyone starts chattering.) With the Queen's ear, I could lead Britain and the rest of the world into a new age of progress and discovery. (Everyone laughs.) (Kelvin: Fair enough. I, Lord Kelvin, hereby vow to surrender my position as Minister of Science, to Phileas Fogg...if he can circumnavigate the globe... in no more than 80 days. But if he cannot, he must never set foot in the academy again, he must tear down that abhorrent eyesore he calls a laboratory, and he must swear... never to invent again.) (Phileas only stares at Kelvin in fear.) (Kelvin: Just as I always suspected, Fogg. You promise so much, yet you deliver... oh, nothing.) (More laughter.) I'll take your wager. (Kelvin: What did you say?) I'LL TAKE YOUR WAGER! (More chattering.) (Kelvin: Then it's done. A man who has never set foot out of England, circling the globe. This is going to be rather amusing.) (Fogg skates up to Kelvin.) History won't remember your amusements, Lord Kelvin. But it'll be hard-pressed to forget the moment I'm standing on the very top step of the Royal Academy of Science... (Big Ben strikes noon.) By the strike of noon. (Passepartout smiles.) After I, Phileas Fogg, have traveled 'around the world in 80 days!"

- Phileas Fogg being pressured into a bet with Lord Kelvin to circumnavigate the world in 80 days. "Sutler can no longer trust you, can he, Mr Creedy, and we both know why. After I destroy Parliament, his only chance will be to offer them someone else, some other bit of meat. And who will that be? You, Mr Creedy. A man as smart as you has probably considered this. A man as smart as you probably has a plan. That plan is the reason Sutler no longer trusts you. It's the reason you're being watched right now, why there are eyes and ears in every room of this house and a tap on every phone. (Creedy: B******s.) Ooh, a man as smart as you, I think, knows otherwise. (Creedy: What do you want?) Sutler. Come now, Mr Creedy, you knew this was coming. You knew that one day, it'd be you or him. That's why Sutler's been kept underground for "security purposes". That's why there are several of your men close to Sutler. Men that can be counted on. All you have to do is say the word. (Creedy: What do I get out of this deal?) Me. If you accept, put an X on your front door. (Creedy: Why should I trust you?) Because it's the only way you're going to stop me."

- - V makes a deal with Party Leader Creedy, to surrender in exchange for Chancellor Sutler's execution.

"(Vincent furiously sees his wagon load of food get crushed by an oncoming truck. He attacks RJ and prepares to eat him!) VINCENT, WAIT! I CAN GET IT ALL BACK!! (Vincent stops and considers this) That's right! If you eat me, YOU'D have to do it! But I can get it! All of it! (Vincent looks thoughtful) (Vincent: Hmm...My red wagon?) Redder!-Ow! (Vincent: The Blue Cooler?) Blue Cooler on my list! Gotta be blue? (Vincent: Yes! And I want my Spuddies! I love those things, 'cause with a Spuddy enough...just isn't enough.) So true! Painfully true! And tell you what, I'm gonna get you the Giant Picnic Pack--Family Fun Size!) (Vincent: They have that?) Pretty sure! (Vincent: All right, RJ. I'm goin' back to sleep. When that moon is full, I'm wakin' up. And all my stuff had better be right back where it was. ) But that's just one week! That's impossible for one--[Vincent squeezes tighter to his head] Ow! A week's perfect! I'll get some helpers. (Vincent: Full moon, ALL my stuff. And don't even think of running away, because if you do, I will hunt you down and kill you.) (throws RJ onto the floor, leaving him sighing in relief.) Okay, okay, you just rest easy, all right, cuz' I'm on it. Hey, in a week from now, we're gonna be laughing about this thing. (laughs to himself)"

- Vincent giving RJ one week to recover all his lost food, or else he'll kill him.