J. Robert Oppenheimer
Cillian Murphy
Katherine 'Kitty' Oppenheimer.
Emily Blunt
Gen. Leslie Groves Jr.
Matt Damon
Lewis Strauss
Robert Downey Jr.
Jean Tatlock
Florence Pugh
Edward Teller
Benny Safdie
Robert Serber
Michael Angarano
Ernest Lawrence
Josh Hartnett
Frank Oppenheimer
Dylan Arnold
Isidor Isaac Rabi
David Krumholtz
Richard Feynman
Alden Ehrenreich
Vannevar Bush
Matthew Modine
Harry S. Truman
Gary Oldman
Jackie Oppenheimer
Emma Dumont
Klaus Fuchs
Christopher Denham
Enrico Fermi
Danny Deferrari
George Eltenton
Guy Burnet
Kenneth Bainbridge
Josh Peck
Hans Bethe
Gustaf Skarsgård
Richard Tolman
Tom Jenkins
Seth Neddermeyer
Devon Bostick
Army Air Force Officer
Bryce Johnson
Senator's Assistant
Meg Schimelpfenig
Dutch Student
Petrie Willink
Henry Stimson
James Remar