Edward Teller (3 episodes, 1987)
Leo Szilard (3 episodes, 1987)
General Leslie Groves (3 episodes, 1987)
Robert Oppenheimer (3 episodes, 1987)
Enrico Fermi (3 episodes, 1987)
Gertrude Weiss (3 episodes, 1987)
Otto Frisch (3 episodes, 1987)
Hans Bethe (3 episodes, 1987)
Mici Teller (3 episodes, 1987)
Klaus Fuchs (3 episodes, 1987)
Ernest Lawrence (3 episodes, 1987)
Laura Fermi (3 episodes, 1987)
John von Neumann (3 episodes, 1987)
Albert Einstein (3 episodes, 1987)
Secretary Stimson (3 episodes, 1987)
Louis Slotin (2 episodes, 1987)
Werner Heisenberg (2 episodes, 1987)
General Curtis LeMay (2 episodes, 1987)
Carl von Weizsacker (2 episodes, 1987)
Jean O'Leary (2 episodes, 1987)
Irene Joliot-Curie (2 episodes, 1987)
George Kistiakowsky (2 episodes, 1987)
Frederic Joliot-Curie (2 episodes, 1987)
Rose Bethe (2 episodes, 1987)
Company Executive (2 episodes, 1987)
Harry Gold (2 episodes, 1987)
Norris Bradbury (2 episodes, 1987)
Lise Meitner (1 episode, 1987)
Lewis Strauss (1 episode, 1987)
Arthur Compton (1 episode, 1987)
James Chadwick (1 episode, 1987)
Stanislaw Ulam (1 episode, 1987)
Niels Bohr (1 episode, 1987)
James Skardon (1 episode, 1987)
Earl of Suffolk (1 episode, 1987)
Otto Hahn (1 episode, 1987)
James Byrnes (1 episode, 1987)
M.P. Officer (1 episode, 1987)
Col. Paul Tibbets (1 episode, 1987)
War Minister (1 episode, 1987)
Marie Curie (1 episode, 1987)
Pentagon General (1 episode, 1987)
Capt. William Parsons (1 episode, 1987)
Weapons Testing Colonel (1 episode, 1987)
Congressman (1 episode, 1987)
Company President (1 episode, 1987)
Jean Tatlock (1 episode, 1987)
Landlady (1 episode, 1987)
Young Scientist (uncredited) (1 episode, 1987)
Young Nazi (uncredited) (1 episode, 1987)