Paul Newman
Gen. Leslie R. Groves
Acting
Dwight Schultz
J. Robert Oppenheimer
Acting
Bonnie Bedelia
Kitty Oppenheimer
Acting
John Cusack
Michael Merriman
Acting
Laura Dern
Kathleen Robinson
Acting
Ron Frazier
Peter de Silva
Acting
John C. McGinley
Richard Schoenfield
Acting
Natasha Richardson
Jean Tatlock
Acting
Ron Vawter
Jamie Latrobe
Acting
Michael Brockman
William "Deke" Parsons
Acting
Del Close
Dr. Kenneth Whiteside
Acting
John Considine
Robert Tuckson
Acting
Allan Corduner
Franz Goethe
Acting
Joe D'Angerio
Seth Neddermeyer
Acting
Jon DeVries
Johnny Mount
Acting
James Eckhouse
Robert Harper
Acting
Todd Field
Robert Wilson
Directing
Mary Pat Gleason
Dora Welsh
Acting
Clark Gregg
Douglas Panton
Acting
Péter Halász
George Kistiakowsky
Acting
Gerald Hiken
Leo Szilard
Acting
Arthur Holden
Oakridge Doctor
Acting
Ed Lauter
Whitney Ashbridge
Acting
Donald MacKechnie
James Tuck
Acting
Madison Mason
Boris Pash
Acting
Krzysztof Pieczyński
Otto Frisch
Acting
Don Pugsley
Bronston
Acting
Logan Ramsey
Brehon Somervell
Acting
Fred Thompson
Melrose Hayden Barry
Acting
Jim True-Frost
Donald Hornig
Acting
Barry Yourgrau
Edward Teller
Acting
Marek Alboszta
Scientist
Acting
Steven Baigelman
Dr. Avenell
Writing
Frank Benettieri Jr.
Messenger
Acting
Roger Cubicciotti
Frank Oppenheimer
Acting
Franco Cutietta
Enrico Fermi
Acting
Robert Peter Gale
Dr. Louis Hempelman
Writing
Wesley Harrison
Peter Oppenheimer
Acting
Brent Harrison
Peter Oppenheimer
Acting
Tom McFarlane
Scientist
Acting
David C. Parnes
Raincoat Man
Acting
Allen Poirson
Harold McDonald
Acting
David Politzer
Robert Serber
Acting
Bill Rubenstein
Times Reporter
Writing
Ken Strausbaugh
Observation Officer
Acting
Walter Sullivan
Henry Stimson
Acting
Brian Wandell
Dennis Talmudge
Acting
John Williams
Mack Stoddard
Acting
Walker Edmiston
(voice)
Acting
Matthew Faison
(voice)
Acting
Stan Jones
(voice)
Acting
Alan Oppenheimer
(voice)
Acting