| Cast |
|---|
| Bruce Feather | J. Robert Oppenheimer, Physicist | |
| Frank Wildgen | Gordon Gray, Chairman, Personnel Security Board | |
| Edwin (Eddie) Nunn | Ward V. Evans, Board Member | |
| Earle Smythe | Thomas A. Morgan, Board Member | *appearing by permission of Actors' Equity Association |
| Terry Lawrence | Roger Robb, Counsel for Atomic Energy Commission | |
| Wilfred (Wilf) Dubé | C.A. Rolander, Associate of Robb, Security Expert | |
| Drummond Lister | Lloyd K. Garrison, Counsel for Oppenheimer | |
| Joseph L. (Joe) Shaver | Herbert S. Marks, Counsel for Oppenheimer | *appearing by permission of Actors' Equity Association |
| Al Hand | Major Nicholas Radzi, Security Officer | |
| Bernard (Barney) McManus | John Lansdale, Lawyer, formerly Security Officer | *appearing by permission of Actors' Equity Association |
| James G. (Jim) Mimnagh | Edward Teller, Physicist | |
| John (J.R.) Kohr | Hans Bethe, Physicist | |
| Arthur Miller | David Tressel Griggs, Chief Scientist of Air Force | |
| William (Bill) Polsky | Isador Isaac Rabi, Physicist | |
| William (Bill) Luxton | Announcer | |
| James (Jim, J.A.B.) Stevenson | Court Official | |
| Tandy Muir-Warden | Court Stenographer | |
| Lynne Pepper | Court Stenographer | |
| Jane Beauchamp | Court Stenographer | |
| Serge Fex | Court Attendant / Soldier | |
| Kenneth (Ken) McGill | Soldier | |
