-
J. Robert Oppenheimer
-
Kitty Oppenheimer
-
Leslie Groves
-
Lewis Strauss
-
Jean Tatlock
-
Ernest Lawrence
-
Boris Pash
-
David Hill
-
Niels Bohr
-
Edward Teller
-
Roger Robb
-
Frank Oppenheimer
-
Albert Einstein
-
Patrick Blackett
-
William Borden
-
Kenneth Nichols
-
Senate Aide
-
Gordon Gray
-
Haakon Chevalier
-
Isidor Rabi
-
Vannevar Bush
-
Counsel
-
Thomas Morgan
-
Ward Evans
-
Lloyd Garrison
-
Senator McGee
-
Chairman Magnuson
-
Senator Bartlett
-
Senator Pastore
-
Senator Scott
-
Dutch Student
-
Werner Heisenberg
-
Luis Alvarez
-
Rossi Lomanitz
-
Hartland Snyder
-
Robert Serber
-
Jackie Oppenheimer
-
Mary Washburn
-
Barbara Chevalier
-
George Eltenton
-
Richard Tolman
-
Ruth Tolman
-
Joe Volpe
-
Congressman
-
Edward Condon
-
Donald Hornig
-
Kenneth Bainbridge
-
Richard Feynman
-
Concerned Scientist
-
Hans Bethe
-
Kurt Gödel
-
George Kistiakowsky
-
Seth Neddermeyer
-
Enrico Fermi
-
Klaus Fuchs
-
Charlotte Serber
-
J. Ernest Wilkins
-
Leo Szilard
-
Lilli Hornig
-
Lyall Johnson
-
Philip Morrison
-
Henry Stimson
-
George C. Marshall
-
James Byrnes
-
James Conant
-
AAF Officer
-
Weatherman
-
Army Captain
-
Soldier
-
AAF Officer 2
-
Burn Victim
-
Laughing Woman
-
Kissing Woman
-
Kissing Man
-
Weeping Man
-
Consoling Woman
-
Presidential Aide
-
Harry Truman
-
Lyndon Johnson
-
Senator's Assistant (uncredited)
