Trailer
Cast
Jeff Hephner
Congressman
Gustaf Skarsgård
Hans Bethe
Christopher Denham
Klaus Fuchs
Drew Kenney
Soldier
Christina Hogue
Kissing Woman
Alden Ehrenreich
Senate Aide
Petrie Willink
Dutch Student
Guy Burnet
George Eltenton
Meg Schimelpfenig
Senator's Assistant (uncredited)
David Dastmalchian
William Borden
Matthew Modine
Vannevar Bush
Harry Groener
Senator McGee
Alex Wolff
Luis Alvarez
Britt Kyle
Barbara Chevalier
Tom Jenkins
Richard Tolman
Will Roberts
George C. Marshall
Tom Conti
Albert Einstein
Sadie Stratton
Mary Washburn
Máté Haumann
Leo Szilard
Gary Oldman
Harry Truman
Florence Pugh
Jean Tatlock
Josh Hartnett
Ernest Lawrence
Kurt Koehler
Thomas Morgan
Jack Quaid
Richard Feynman
Danny Deferrari
Enrico Fermi
Hap Lawrence
Lyndon Johnson
Scott Grimes
Counsel
Gregory Jbara
Chairman Magnuson
Rami Malek
David Hill
Benny Safdie
Edward Teller
Steven Houska
Senator Scott
Trond Fausa Aurvåg
George Kistiakowsky
Jack Cutmore-Scott
Lyall Johnson
Casey Affleck
Boris Pash
Dane DeHaan
Kenneth Nichols
Tim DeKay
Senator Pastore
Michael Andrew Baker
Joe Volpe
Flora Nolan
Burn Victim
Clay Bunker
Kissing Man
Kate French
Presidential Aide
David Rysdahl
Donald Hornig
James Remar
Henry Stimson
Bryce Johnson
AAF Officer 2
Cillian Murphy
J. Robert Oppenheimer
James D'Arcy
Patrick Blackett
Jessica Erin Martin
Charlotte Serber
Ronald Auguste
J. Ernest Wilkins
John Gowans
Ward Evans
Macon Blair
Lloyd Garrison
Ted King
Senator Bartlett
Tony Goldwyn
Gordon Gray
Jason Clarke
Roger Robb
Josh Peck
Kenneth Bainbridge
Brett DelBuono
Concerned Scientist
James Urbaniak
Kurt Gödel
Olivia Thirlby
Lilli Hornig
Kenneth Branagh
Niels Bohr
David Krumholtz
Isidor Rabi
Olli Haaskivi
Edward Condon
Devon Bostick
Seth Neddermeyer
Jefferson Hall
Haakon Chevalier
Harrison Gilbertson
Philip Morrison
Pat Skipper
James Byrnes
Emily Blunt
Kitty Oppenheimer
Matt Damon
Leslie Groves
Robert Downey Jr.
Lewis Strauss
Dylan Arnold
Frank Oppenheimer
Matthias Schweighöfer
Werner Heisenberg
Rory Keane
Hartland Snyder
Michael Angarano
Robert Serber
Louise Lombard
Ruth Tolman
Josh Zuckerman
Rossi Lomanitz
Sean Avery
Weatherman
Kerry Westcott
Laughing Woman
Tyler Beardsley
Weeping Man
Maria Teresa Zuppetta
Consoling Woman
Emma Dumont
Jackie Oppenheimer
Steve Coulter
James Conant
Jeremy John Wells
AAF Officer
Adam Kroeger
Army Captain