Eve Kendall: How do I know you aren't a murderer?
Roger Thornhill: You don't.
Eve Kendall: Maybe you're planning to murder me right here, tonight.
Roger Thornhill: Shall I?
Eve Kendall: Please do.
Eve Kendall: I want you to do a favor for me. A big, big favor.
Roger Thornhill: Name it.
Eve Kendall: I want you to leave right now, stay far away from me, and don't come near me again. We're not going to get involved. Last night was last night, and it's all there was, and it's all there is. There isn't going to be anything more between us. So please. Goodbye, good luck, no conversation, just leave.
Phillip Vandamm: What possessed you to come blundering in here like this? Could it be an overpowering interest in art?
Roger Thornhill: Yes, the art of survival.
Eve Kendall: He followed me here from the hotel.
Leonard: He was in your room?
Roger Thornhill: Sure. Isn't everybody?
Roger Thornhill: What's wrong with men like me?
Eve Kendall: They don't believe in marriage.
Roger Thornhill: I've been married twice.
Eve Kendall: See what I mean?
I may go back to hating you. It was more fun.Roger Thornhill
Roger Thornhill: I don't like the games you play, Professor.
The Professor: War is hell, Mr. Thornhill. Even when it's a cold one.
Roger Thornhill: If you fellows can't lick the VanDamm's of this world without asking girls like her to bed down with them and fly away with them and probably never come back, perhaps you ought to start learning how to lose a few cold wars.
The Professor: I'm afraid we're already doing that.
Leonard: You must have had some doubts about her yourself. You still do.
Phillip Vandamm: Rubbish.
Leonard: Why else would you have decided not to tell her that our little treasure here has a belly full of microfilm?
Phillip Vandamm: You seem to be trying to fill mine with rotten apples.
Leonard: Sometimes the truth does taste like a mouthful of worms.
Phillip Vandamm: The truth? I've heard nothing but innuendos.
Leonard: Call it my woman's intuition, if you will. But I've never trusted neatness. Neatness is always the result of deliberate planning.
Leonard: You're not taking her on the plane with you?
Phillip Vandamm: Of course I am. Like our friends, I too believe in neatness, Leonard. This matter is best disposed of from a great height, over water.
Roger Thornhill: How does a girl like you get to be a girl like you?
Eve Kendall: Lucky, I guess.
I didn't realize you were an art collector. I thought you just collected corpses.Roger Thornhill
Phillip Vandamm: Mr. Kaplan, you are quite the performer. First you're the outraged Madison Avenue advertising executive who claims that he has been mistaken for someone else. Next, you play the fugitive from justice supposedly trying to clear himself of a crime he knows he didn't commit. And now, you're the jealous lover spurned by love and betrayal.
Roger Thornhill: Apparently the only performance that will satisfy you is when I play dead.
Phillip Vandamm: Your very next role, and you'll be quite convincing, I assure you.
Roger Thornhill: Now, what can a man do with his clothes off for twenty minutes? Couldn't he have taken an hour?
Eve Kendall: You could always take a cold shower.