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."
as Gen. Leslie R. Groves
as J. Robert Oppenheimer
as Kitty Oppenheimer
as Michael Merriman
as Kathleen Robinson
as Peter de Silva
as Richard Schoenfield
as Jean Tatlock
as Jamie Latrobe
as William "Deke" Parsons
as Dr. Kenneth Whiteside
as Robert Tuckson
as Franz Goethe
as Seth Neddermeyer
as Johnny Mount
as Robert Harper
as Robert Wilson
as Dora Welsh
as Douglas Panton
as George Kistiakowsky
as Leo Szilard
as Oakridge Doctor
as Whitney Ashbridge
as James Tuck
as Boris Pash
as Otto Frisch
as Bronston
as Brehon Somervell
as Melrose Hayden Barry
as Donald Hornig
as Edward Teller
as Scientist
as Dr. Avenell
as Messenger
as Frank Oppenheimer
as Enrico Fermi
as Dr. Louis Hempelman
as Peter Oppenheimer
as Peter Oppenheimer
as Scientist
as Raincoat Man
as Harold McDonald
as Robert Serber
as Times Reporter
as Observation Officer
as Henry Stimson
as Dennis Talmudge
as Mack Stoddard
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