| Episode credited cast: |
 | Walter Boyne | - | Himself: USAF, Retired (as Col. Walter J. Boyne) |
| Mike Burns | - | Himself: Science Adviser to the President |
| Steve Ebersole | - | Himself: DARHT Controls / Data Acq. Leader |
 | Albert Einstein | - | Himself (archive footage) |
 | Adolf Hitler | - | Himself (archive footage) |
| Ken Jones | - | Himself: Div. Leader / Dynamic Experimentation |
 | John F. Kennedy | - | Himself (archive footage) |
 | Nikita Khrushchev | - | Himself (archive footage) |
 | Richard Nixon | - | Himself (archive footage) |
| Sara Olsen | - | Herself: Explosive Ordnance Disposal (as Lt. Sara Olsen) |
| Raymond Puffer | - | Himself: Air Force Historian (as Raymond Puffer PhD) |
| John Rhoades | - | Himself: Dir. Bradbury Science Museum |
 | Franklin D. Roosevelt | - | Himself (archive footage) |
| Glenn Seaborg | - | Himself: Co-Discoverer Plutonium (as Dr. Glenn T. Seaborg) |
| Lloyd Sherr | - | Narrator (voice) (as Max Raphael) |
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