Kenneth Branagh
- Niels Bohr
Jason Clarke
- Roger Robb
David Krumholtz
- Isidor Isaac Rabi
Alden Ehrenreich
- L'assistant du sénateur
Benny Safdie
- Edward Teller
Tom Conti
- Albert Einstein
Macon Blair
- Lloyd Garrison
Dylan Arnold
- Frank Oppenheimer
Trond Fausa
- George Kistiakowsky
Jefferson Hall
- Haakon Chevalier
Gustaf Skarsgård
- Hans Bethe
Tony Goldwyn
- Gordon Gray
Michael Angarano
- Robert Serber
Dane DeHaan
- Kenneth Nichols
David Dastmalchian
- William Borden
Gary Oldman
- Harry S. Truman
Matthew Modine
- Vannevar Bush
Jack Quaid
- Richard Feynman
Olli Haaskivi
- Edward Condon
James Remar
- Henry Stimson
Harry Groener
- Senator McGee
Harrison Gilbertson
- Philip Morrison
Máté Haumann
- Leo Szilard
James D'Arcy
- Patrick Blackett
Matthias Schweighöfer
- Werner Heisenberg
Devon Bostick
- Seth Neddermeyer
Olivia Thirlby
- Lilli Hornig
Josh Zuckerman
- Rossi Lomanitz
Scott Grimes
- Counsel
Rory Keane
- Hartland Snyder
Kate French
- Assistant of the President
Tim DeKay
- Senator Pastore
Alex Wolff
- Luis Alvarez
Josh Peck
- Kenneth Bainbridge
Ted King
- Senator Bartlett
Pat Skipper
- James Byrnes
Guy Burnet
- George Eltenton
Christopher Denham
- Klaus Fuchs
David Rysdahl
- Donald Hornig
Jack Cutmore-Scott
- Lyall Johnson
Emma Dumont
- Jackie Oppenheimer
Louise Lombard
- Ruth Tolman
