- Richard Schoenfield: Hey Oppenheimer! Oppenheimer! You oughta stop playing God, 'cause you're no good at it, and the position's taken!
- Gen. Leslie R. Groves: I want three stories. The first, if we succeed. The second, if we fail. The third, if we disintegrate.
- Gen. Leslie R. Groves: Gotta come down out of the clouds gentlemen, and get into the business... of winning the war.
- Gen. Leslie R. Groves: We could give this country the biggest stick in the playground, and I intend to do that.
- Gen. Leslie R. Groves: It's delicate stuff. I'm talking about my longhairs, my prima donnas. Jewish element. Take Hitler out of the equation, they might just run out of stink. Why chance it?
- Michael Merriman: SPOILER:
- [after grabbing the plutonium core, which was going critical]
- Michael Merriman: Nobody move, don't anybody move!
- Michael Merriman: [Grasps hand] Damn it! Take out everything metal, drop it to the floor. Mark the positions you're standing, and get out.
- [Doing calculations on a blackboard]
- Michael Merriman: Everybody should make it... except me. I'm dead.
- Gen. Leslie R. Groves: I need him to come through on this. He owes it to his country. He owes it to himself. He is the best there is, and he should have whatever he wants.
- Kitty Oppenheimer: Don't try to recruit me, General. You don't need my help. And spare me your homily on being a good wife--I know it by heart.
- Gen. Leslie R. Groves: Why did you put up with her for so long?
- Kitty Oppenheimer: Because he's the best there is... and he should have whatever he wants!
- Richard Schoenfield: Oh, bad news, beautiful. Uh, I'm not gonna be able to make that movie tonight. I can, however, join you both for a drink afterwards, if it would make you very happy.
- Kathleen Robinson: Perfect!
- Michael Merriman: [Sourly] Sounds good.
- Richard Schoenfield: Right... right. Well, I promised the monkey we'd be cutting the rug anyways, so it's just as well.
- Kathleen Robinson: Michael, what's wrong with you?
- Michael Merriman: You see much of him?
- Kathleen Robinson: Yes, I like him. Are you jealous?
- Michael Merriman: Yeah.
- Kathleen Robinson: [Smiles] You'd better do something about it!
- Gen. Leslie R. Groves: Where is he?
- Kitty Oppenheimer: He's out back... sitting in the sun with a blanket in his lap. Nursing a guilty dick, no doubt.
- Gen. Leslie R. Groves: It is not necessary to be vulgar.
- Kitty Oppenheimer: Nothing I say could approach the vulgarity of what you're building in your backyard.