Credits
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- Job
- director of photography
- Department
- camera
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- Job
- production design
- Department
- art
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- Job
- art direction
- Department
- art
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- Job
- original music composer
- Department
- sound
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- Job
- production manager
- Department
- production
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- Job
- executive producer
- Department
- production
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- Job
- executive producer
- Department
- production
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- Job
- unit production manager
- Department
- production
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- Job
- producer
- Department
- production
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- Job
- unit manager
- Department
- production
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- Job
- executive in charge of production
- Department
- production
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- Job
- editor
- Department
- editing
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- Job
- assistant hairstylist
- Department
- costume & make-up
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- Job
- key makeup artist
- Department
- costume & make-up
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- Job
- hairstylist
- Department
- costume & make-up
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- Job
- costume design
- Department
- costume & make-up
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- Job
- makeup department head
- Department
- costume & make-up
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- Job
- assistant hairstylist
- Department
- costume & make-up
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- Job
- third assistant director
- Department
- directing
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- Job
- third assistant director
- Department
- directing
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- Job
- first assistant director
- Department
- directing
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- Job
- second assistant director
- Department
- directing
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- Job
- director
- Department
- directing
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- Job
- teleplay
- Department
- writing
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- Job
- book
- Department
- writing
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- Job
- actor
- Department
- actors
- Character
- Gen. Leslie Groves
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- Job
- actor
- Department
- actors
- Character
- J. Robert Oppenheimer
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- Job
- actor
- Department
- actors
- Character
- Leo Szilard
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- Job
- actor
- Department
- actors
- Character
- James F. Byrnes
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- Job
- actor
- Department
- actors
- Character
- President Harry S. Truman
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- Job
- actor
- Department
- actors
- Character
- Gen. George Marshall
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- Job
- actor
- Department
- actors
- Character
- Henry Stimson
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- Job
- actor
- Department
- actors
- Character
- Dr. Arthur Compton
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- Job
- actor
- Department
- actors
- Character
- Franklin D. Roosevelt
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- Job
- actor
- Department
- actors
- Character
- Kitty Oppenheimer
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- Job
- actor
- Department
- actors
-
- Job
- actor
- Department
- actors
- Character
- Colonel Pash
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- Job
- actor
- Department
- actors
- Character
- Edward Teller
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- Job
- actor
- Department
- actors
-
- Job
- actor
- Department
- actors
- Character
- Seth
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- Job
- actor
- Department
- actors
- Character
- Dwight D. Eisenhower
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- Job
- actor
- Department
- actors
- Character
- Groves's Commanding Officer
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- Job
- actor
- Department
- actors
-
- Job
- actor
- Department
- actors
- Character
- Ralph A. Bard
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- Job
- actor
- Department
- actors
- Character
- Enrico Fermi
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- Job
- actor
- Department
- actors
- Character
- Trude Weiss
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- Job
- actor
- Department
- actors
- Character
- Colonel Nichols
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- Job
- actor
- Department
- actors
- Character
- Eugen Wigner
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- Job
- actor
- Department
- actors
- Character
- Albert Einstein
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- Job
- actor
- Department
- actors
- Character
- Richard Feynman
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- Job
- actor
- Department
- actors
- Character
- Hans Bethe
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- Job
- actor
- Department
- actors
- Character
- Samuel Goudsmit
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- Job
- actor
- Department
- actors
- Character
- Klaus Fuchs
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- Job
- actor
- Department
- actors
- Character
- Lord Rutherford
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- Job
- actor
- Department
- actors
- Character
- Haakon Chevalier
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- Job
- actor
- Department
- actors
- Character
- Michael Polanyi
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- Job
- actor
- Department
- actors
- Character
- Ilse Polanyi
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- Job
- actor
- Department
- actors
- Character
- Colonel Lansdale
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- Job
- actor
- Department
- actors
- Character
- Robert Wilson
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- Job
- actor
- Department
- actors
- Character
- Mrs. Wisnovsky
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- Job
- actor
- Department
- actors
- Character
- Jack Wisnovsky
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- Job
- actor
- Department
- actors
- Character
- Shapp
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- Job
- actor
- Department
- actors
- Character
- Mrs. Trowbridge
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- Job
- actor
- Department
- actors
- Character
- Robert Serber
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- Job
- actor
- Department
- actors
- Character
- Ed Condon
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- Job
- actor
- Department
- actors
- Character
- William 'Deke' Parsons
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- Job
- actor
- Department
- actors
- Character
- Captain DeSilva
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- Job
- actor
- Department
- actors
- Character
- T. O. Jones
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- Job
- actor
- Department
- actors
- Character
- James Tuck
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- Job
- actor
- Department
- actors
- Character
- Harry Gold
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- Job
- actor
- Department
- actors
- Character
- Army Major
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- Job
- actor
- Department
- actors
- Character
- Fleischmann
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- Job
- actor
- Department
- actors
- Character
- Haagen Kistiakowski
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- Job
- actor
- Department
- actors
- Character
- George Kistiakowski
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- Job
- actor
- Department
- actors
- Character
- Kenneth Bainbridge
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- Job
- actor
- Department
- actors
- Character
- William D. Leahy
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- Job
- actor
- Department
- actors
- Character
- Paul Tibbets
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- Job
- actor
- Department
- actors
- Character
- Air Force Guard
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- Job
- actor
- Department
- actors
- Character
- Chemist
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- Job
- actor
- Department
- actors
- Character
- Alfred MacCormack
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- Job
- actor
- Department
- actors
- Character
- Army General
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- Job
- actor
- Department
- actors
- Character
- John J. McCloy
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- Job
- actor
- Department
- actors
- Character
- Allan Dulles
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- Job
- actor
- Department
- actors
- Character
- London Pedestrian
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- Job
- actor
- Department
- actors
- Character
- British Jr. Officer
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- Job
- actor
- Department
- actors
- Character
- British Sr. Officer
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- Job
- actor
- Department
- actors
- Character
- Alexander Sachs
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- Job
- actor
- Department
- actors
- Character
- General Pa Watson
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- Job
- actor
- Department
- actors
- Character
- Los Alamo Scientist (uncredited)
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- Job
- actor
- Department
- actors
- Character
- Scientist (uncredited)
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- Job
- actor
- Department
- actors
- Character
- Leo Szilard's Prime Scientist (uncredited)