Cillian Murphy

J. Robert Oppenheimer

Emily Blunt

Kitty Oppenheimer

Matt Damon

Leslie Groves

Robert Downey Jr.

Lewis Strauss

Florence Pugh

Jean Tatlock

Josh Hartnett

Ernest Lawrence

Casey Affleck

Boris Pash

Rami Malek

David Hill

Kenneth Branagh

Niels Bohr

Benny Safdie

Edward Teller

Jason Clarke

Roger Robb

Dylan Arnold

Frank Oppenheimer

Tom Conti

Albert Einstein

James D'Arcy

Patrick Blackett

David Dastmalchian

William Borden

Dane DeHaan

Kenneth Nichols

Alden Ehrenreich

Senate Aide

Tony Goldwyn

Gordon Gray

Jefferson Hall

Haakon Chevalier

David Krumholtz

Isidor Rabi

Matthew Modine

Vannevar Bush

Scott Grimes

Counsel

Kurt Koehler

Thomas Morgan

John Gowans

Ward Evans

Macon Blair

Lloyd Garrison

Harry Groener

Senator McGee

Gregory Jbara

Chairman Magnuson

Ted King

Senator Bartlett

Tim DeKay

Senator Pastore

Steven Houska

Senator Scott

Petrie Willink

Dutch Student

Matthias Schweighöfer

Werner Heisenberg

Alex Wolff

Luis Alvarez

Josh Zuckerman

Rossi Lomanitz

Rory Keane

Hartland Snyder

Michael Angarano

Robert Serber

Emma Dumont

Jackie Oppenheimer

Sadie Stratton

Mary Washburn

Britt Kyle

Barbara Chevalier

Guy Burnet

George Eltenton