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