| Person | Type | Job | Role(s) |
|---|---|---|---|
 Charles Olivier | Crew | Writing | Writer |
 Dan Cogan | Crew | Production | Co-Producer |
David Grubin | Crew | Directing | Director, Producer, Writer |
Kate Taverna | Crew | Editing | Editor |
 Mark Samels | Crew | Production | Executive Producer |
Nick Fraser | Crew | Production | Executive Producer |
James Callanan | Crew | Camera | Director of Photography |
Deborah Peretz | Crew | Editing | Editor |
Tania Castellanos | Crew | Production | Co-Producer |
 Boyd Gaines | Cast | Actor | Chairman Gray (voice) |
 Campbell Scott | Cast | Actor | Narrator (voice) |
 Daniel Gerroll | Cast | Actor | Colonel Pash |
 David Strathairn | Cast | Actor | J. Robert Oppenheimer |
 Dwight D. Eisenhower | Cast | Actor | Self (Archive Photos) |
 Freeman Dyson | Cast | Actor | Self |
Harold Agnew | Cast | Self | |
 Harry S. Truman | Cast | Actor | Self (Archive Footage) |
 J. Edgar Hoover | Cast | Actor | Self (Archive Footage/Photos) |
 J. Robert Oppenheimer | Cast | Actor | Self (archive footage/photos) |
 Joseph McCarthy | Cast | Actor | Self (archive footage) |
 Lyndon B. Johnson | Cast | Actor | Self (Archive Footage) |
 Michael Stuhlbarg | Cast | Actor | Edward Teller |
 Zoë Wanamaker | Cast | Actress | Self- Narrator |
Richard Rhodes | Cast | Actor | Self |
 Michael Cumpsty | Cast | Actor | |
Jeremy Bernstein | Cast | Self | |
 Eleanor Roosevelt | Cast | Actress | Self (Archive Footage) |
Ellen Katz | Cast | The Stenographer | |
Martin J. Sherwin | Cast | Actor | Self |
 Edward Teller | Cast | Actor | Self (Archive Footage/Photos) |
 Lewis Strauss | Cast | Actor | Self (Archive Photos) |
| Person | Type | Job | Role(s) |
