출연진
Paul Frees
Self - Narrator (voice)
Jon Else
Interviewer
J. 로버트 오펜하이머
Self (archive footage)
Hans Bethe
Self
Frank Oppenheimer
Self
Haakon Chevalier
Self
Robert Serber
Self
Holm Bursom
Self
Stirling Colgate
Self
Freeman Dyson
Self
Susan Evans
Self
Francis Fergusson
Self
Leslie Groves
Self (archive footage)
Elizabeth Ingram
Self
Robert Krohn
Self
Dave MacDonald
Self
Joseph McCarthy
Self (archive footage)
Dorothy McKibben
Self
Robert Porton
Self
Isidor Isaac Rabi
Self
해리 S. 트루먼
Self (archive footage)