| Person | Type | Job | Role(s) |
|---|---|---|---|
 Steve James | Crew | Directing | Director, Editor, Writer |
 Jeff Skoll | Crew | Production | Executive Producer |
 Diane Weyermann | Crew | Production | Executive Producer |
Tom Bergmann | Crew | Camera | Director of Photography |
Tim Horsburgh | Crew | Production | Executive Producer |
 Ann Harding | Cast | Actress | Self (archive footage) (uncredited) |
 Dwight D. Eisenhower | Cast | Actor | Self (archive footage) (uncredited) |
 J. Robert Oppenheimer | Cast | Actor | Self (archive footage) (uncredited) |
 Joseph Stalin | Cast | Actor | Self (archive footage) (uncredited) |
 Leslie Groves | Cast | Actor | Self (archive footage) (uncredited) |
 Walter Huston | Cast | Actor | Self (archive footage) (uncredited) |
Zach Twardowski | Cast | Actor | Ed Hall |
Joseph E. Davies | Cast | Self (archive footage) (uncredited) | |
 Mickey O'Sullivan | Cast | Actor | FBI Agent McQueen |
Henry L. Stimson | Cast | Self (archive footage) (uncredited) | |
 Paul Tibbets | Cast | Actor | Self (archive footage) (uncredited) |
Joan Hall | Cast | Self | |
Theodore Hall | Cast | Actor | Self (archive footage) |
| Person | Type | Job | Role(s) |
