"[referring to Oppenheimer] I have always assumed, and now assume, that he is loyal to the United States. I believe this, and I shall believe it until I see very conclusive proof to the opposite."

"Guy Burnet - George Eltenton"

"Emma Dumont - Jackie Oppenheimer"

"Why go through all this against a man who’s accomplished what Dr. Oppenheimer has? Look at his record; we have an A-bomb and a whole series of it, and we have a whole series of Super bombs. What more do you want? Mermaids?"

"You drown in ten feet of water or ten thousand, what’s the difference? We can already drown Russia, and they know it."

"So here we are, lost in your quantum world of probabilities and needing certainty."

"[to Oppenheimer] About the only thing you and I share is a disdain for mathematics."

"An H-bomb would be one thousand times the power of an A-bomb. The only intended target would be the largest cities. It’s a weapon of mass genocide."

"You drop a bomb, it falls on the just and unjust. I don't wish for the culmination for three centuries of physics to be a weapon of mass destruction."

"[to Oppenheimer] When you speak, they hear a prophet. When Strauss speaks, they hear themselves...a prophet can’t be wrong. Not once."

"You’ve served America well, and if this is the reward she has to offer, then perhaps you should turn your back on her."

"[to Oppenheimer] Take off that ridiculous uniform. You’re a scientist."

"[to Edward Condon] You have just the rights that I give you - no more, no less!"

"Algebra is like sheet music. The important thing isn't, "can you read music," it's "can you hear it.""

"Quantum physics is not a step forward; it is a new way to understand reality. Einstein's opened the door, [and] now we are seeing a world inside of our world; a world of energy and paradox that not everyone can accept."

"The power you are about to reveal will forever outlive the Nazis, and the world is not prepared."

"We have to make the politicians understand: this isn’t a new weapon, it’s a new world. I’ll be out there, doing what I can, but you.. you’re an American Prometheus - the man who gave them the power to destroy themselves - and they’ll respect that. Then, the work really begins."

"I did what was right for this country. They don’t want me in the Cabinet Room? Maybe they should just invite Oppenheimer instead."

"[to Groves] You didn’t hire me despite my left-wing past, you hired me because of it. So you could control me."

"We’re theorists. Yes? We imagine a future, and our imaginings horrify us. They won’t fear it until they understand it, and they won’t understand it until they’ve used it. When the world learns the terrible secret of Los Alamos, our work here will ensure a peace mankind has never seen -- a peace based on the kind of international cooperation that Roosevelt always envisaged."

"[to Oppenheimer] You're the great improviser, but this you can't do in your head."

"J. Robert Oppenheimer the martyr. I gave him exactly what he wanted. To be remembered for Trinity. Not Hiroshima, not Nagasaki. He should be thanking me."

"[to Szilard, referring to the atomic bomb] Just because we’re building it doesn’t mean we get to decide how it’s used."

"America and Russia may be likened to two scorpions in a bottle, each capable of killing the other, but only at the risk of his own life."

"Rami Malek - David Hill"

"[referring to the Chevalier incident] I’ve seen so many versions of it. I wasn’t confused before, but I’m certainly getting there now."

"Benny Safdie - Edward Teller"

"I don't know if we can be trusted with such a weapon, but I know the Nazis can't."

"David Rysdahl - Donald Hornig"

"Casey Affleck -"

"Is anyone ever going to tell the truth about what's happening here?"

"Once it’s used, nuclear war, maybe all war, becomes unthinkable."

"Robert, we’ve given them an ace. It’s for them to play the hand."

"Don't underestimate the psychological impact of an atomic explosion. A pillar of fire ten thousand feet tall, deadly neutron effects for a mile in all directions from one single device, dropped from a barely noticeable B-29. The atomic bomb will be a terrible revelation of divine power."

"I’m gonna fuck you so hard they’ll hear you scream in Warsaw."

"I’m not a bag of potatoes you can transport without permission!"

"Are you lost, baby girl?"

"Lonny Chapman - Sheriff"

"Jack Ging - Papa Coleman"

"Stewart Petersen - Billy Coleman"

"Bill Dunbar - Mr. Kyle"

"James Whitmore - Grandpa"

"Beverly Garland - Mama Coleman"

"Marshall Edwards - The Preacher"

"A Boy's Greatest Adventure Begins..."