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)
Sound (Sound Effects Editor)
Crew (Stunt Coordinator)
Production (Location Manager)
Art (Set Decoration Buyer)
Art (Location Scout)
Art (Set Designer)
Camera (Camera Technician)
Camera (Grip)
Visual Effects (Imaging Science)
Directing (Director)
Production (Producer)
Production (Producer)
Writing (Writer)
Editing (Editor)
Production (Producer)
Sound (Original Music Composer)
Camera (Director of Photography)
Costume & Make-Up (Costume Design)
Art (Set Decoration)
Art (Construction Coordinator)
Sound (Sound Designer)
Art (Set Designer)
Art (Set Designer)
Visual Effects (Special Effects Supervisor)
Visual Effects (Visual Effects Supervisor)
Crew (Driver)
Production (Casting)
Art (Production Design)
Costume & Make-Up (Hairstylist)
Crew (Driver)
Production (Unit Production Manager)
Crew (Stunt Driver)
Visual Effects (Visual Effects Producer)
Crew (Stunt Double)
Costume & Make-Up (Costumer)
Editing (Assistant Editor)
Production (Location Assistant)
Sound (Boom Operator)
Sound (Sound Re-Recording Mixer)
Visual Effects (Visual Effects Production Manager)
Crew (Stunts)
Crew (Stunt Driver)
Costume & Make-Up (Ager/Dyer)
Crew (Driver)
Sound (Foley Editor)
Sound (First Assistant Sound Editor)
Sound (Foley Artist)
Crew (Stunts)
Crew (Stunts)
Costume & Make-Up (Set Costumer)
Crew (Driver)
Sound (Dialogue Editor)
Costume & Make-Up (Costumer)
Editing (Assistant Editor)
Production (Assistant Location Manager)
Sound (Boom Operator)
Visual Effects (Visual Effects Supervisor)
Visual Effects (Visual Effects Producer)
Crew (Stunts)
Crew (Stunts)
Sound (Sound Mixer)
Costume & Make-Up (Set Costumer)
Costume & Make-Up (Key Costumer)
Editing (First Assistant Editor)
Costume & Make-Up (Costumer)
Art (Location Scout)
Production (Assistant Location Manager)
Crew (Driver)
Editing (Assistant Editor)
Crew (Transportation Coordinator)
Costume & Make-Up (Set Costumer)
Production (Assistant Location Manager)
Directing (Script Supervisor)
Editing (Assistant Editor)
Art (Location Scout)
Costume & Make-Up (Costumer)
Costume & Make-Up (Costume Supervisor)
Costume & Make-Up (Assistant Costume Designer)
Costume & Make-Up (Costumer)
Editing (First Assistant Editor)
Editing (Assistant Editor)
Costume & Make-Up (Set Costumer)
Costume & Make-Up (Costumer)
Editing (Assistant Editor)
Production (Assistant Location Manager)
Production (Assistant Location Manager)
Costume & Make-Up (Seamstress)
Production (Location Manager)
Production (Assistant Location Manager)
Production (Location Manager)
Costume & Make-Up (Set Costumer)
Costume & Make-Up (Key Makeup Artist)
Art (Assistant Art Director)
Art (Art Department Assistant)
Directing (Second Second Assistant Director)
Crew (Carpenter)
Art (Construction Coordinator)
Art (Assistant Set Decoration)
Art (Assistant Property Master)
Art (Assistant Property Master)
Art (Graphic Designer)
Art (Art Department Assistant)
Art (Leadman)
Art (Props)
Art (Set Designer)
Directing (Additional Second Assistant Director)
Directing (First Assistant Director)
Art (Assistant Art Director)
Crew (Propmaker)
Art (Set Decoration Buyer)
Directing (Second Assistant Director)
Art (Set Dresser)
Art (Props)
Costume & Make-Up (Hairstylist)
Art (Assistant Art Director)
Art (Construction Foreman)
Costume & Make-Up (Key Hair Stylist)
Directing (Second Assistant Director)
Art (Set Designer)
Costume & Make-Up (Makeup Artist)
Art (Property Master)
Art (Art Department Coordinator)
Art (Painter)
Lighting (Electrician)
Art (Set Decoration Buyer)
Camera (Aerial Camera Technician)
Lighting (Rigging Grip)
Lighting (Lighting Technician)
Art (Set Dresser)
Camera (Best Boy Grip)
Lighting (Lighting Technician)
Camera (Key Grip)
Lighting (Electrician)
Camera (Additional Director of Photography)
Camera (Additional First Assistant Camera)
Camera (Grip)
Art (Set Dresser)
Camera (Aerial Director of Photography)
Camera (Grip)
Art (Set Dresser)
Art (Set Decoration Buyer)
Camera (Still Photographer)
Art (Art Department Assistant)
Camera (First Assistant "B" Camera)
Lighting (Lighting Technician)
Camera (Dolly Grip)
Camera (Grip)
Lighting (Rigging Grip)
Camera (Still Photographer)
Camera (First Assistant "A" Camera)
Lighting (Key Rigging Grip)
Lighting (Key Rigging Grip)
Crew (Set Production Assistant)
Writing (Book)
Writing (Book)
Sound (Sound Re-Recording Mixer)
Costume & Make-Up (Makeup Department Head)
Art (Set Decoration)
Crew (Stunt Driver)
Costume & Make-Up (On Set Dresser)
Crew (Studio Teacher)
Costume & Make-Up (Hair Department Head)
Costume & Make-Up (Makeup Artist)
Crew (Special Effects)
Visual Effects (Compositing Supervisor)
Crew (Compositor)
Production (Executive Producer)
Production (Executive Producer)
Production (Unit Production Manager)
Production (Executive Producer)
Production (Co-Producer)
Production (Unit Production Manager)
Editing (Additional Editor)
Crew (Stunts)
Costume & Make-Up (Hairstylist)
Costume & Make-Up (Hairstylist)
Costume & Make-Up (Prosthetic Designer)
Art (Supervising Art Director)