Eliot Kohen
Narrator (voice)
Acting
J. Robert Oppenheimer
Self (archive footage)
Acting
Frank Oppenheimer
Self
Acting
Hans Bethe
Self
Acting
Edward Teller
Self
Acting
Isidor Isaac Rabi
Self
Acting
Emilio Segrè
Self
Acting
Harold Agnew
Self
Acting
Stanislaw Ulam
Self
Acting
Victor Weisskopf
Self
Acting
George Kistiakowsky
Self
Acting
Philip Morrison
Self
Acting
Priscilla Duffield
Self
Acting
Dorothy McKibbin
Self
Acting
Robert R. Wilson
Self
Acting
Edwin McMillan
Self
Acting
Robert Bacher
Self
Acting