Assigned to oversee the development of the atomic bomb, Gen. Leslie Groves is a stern military man determined to have the project go according to plan. He selects J. Robert Oppenheimer as the key scientist on the top-secret operation, but the two men clash fiercely on a number of issues. Despite their frequent conflicts, Groves and Oppenheimer ultimately push ahead with two bomb designs — the bigger "Fat Man" and the more streamlined "Little Boy."
Paul Newman
Dwight Schultz
Bonnie Bedelia
John Cusack
Laura Dern
Ron Frazier
John C. McGinley
Natasha Richardson
Ron Vawter
Michael Brockman
Del Close
John Considine
Allan Corduner
Joe D'Angerio
Jon DeVries
James Eckhouse
Todd Field
Mary Pat Gleason
Clark Gregg
Péter Halász
Gerald Hiken
Arthur Holden
Ed Lauter
Donald MacKechnie
Madison Mason
Krzysztof Pieczyński
Don Pugsley
Logan Ramsey
Fred Thompson
Jim True-Frost
Barry Yourgrau
Marek Alboszta
Steven Baigelman
Frank Benettieri Jr.
Roger Cubicciotti
Franco Cutietta
Robert Peter Gale
Wesley Harrison
Brent Harrison
Tom McFarlane
David C. Parnes
Allen Poirson
David Politzer
Bill Rubenstein
Ken Strausbaugh
Walter Sullivan
Brian Wandell
John Williams
Walker Edmiston
Matthew Faison
Stan Jones
Alan Oppenheimer