Documentary about the dangers of the nuclear arms race, including an interview with an eyewitness of the bomb drop on Hiroshima and scientific statements describing the devastating consequences of a nuclear war.
| Actor | Role |
|---|---|
 Burt LancasterSelf - Host / Narrator | Self - Host / Narrator |
| SShigeko SasamoriSelf - Hiroshima survivor | Self - Hiroshima survivor |
| GGene R. LaRocqueSelf - Rear Admiral U.S.N. (Ret.) (archive footage) | Self - Rear Admiral U.S.N. (Ret.) (archive footage) |
| KKosta TsipisSelf - PhD. (archive footage) | Self - PhD. (archive footage) |
| VVictor W. SidelSelf - M.D. (archive footage) | Self - M.D. (archive footage) |
 John Kenneth GalbraithSelf - PhD. (archive footage) | Self - PhD. (archive footage) |
| RRichard G. SaxonSelf - M.D. (archive footage) | Self - M.D. (archive footage) |
| JJudd MarmorSelf - M.D. (archive footage) | Self - M.D. (archive footage) |
| HH. Jack GeigerSelf - M.D. (archive footage) | Self - M.D. (archive footage) |
| HHelen CaldicottSelf - M.B., B.S. (archive footage) | Self - M.B., B.S. (archive footage) |
 Dwight D. EisenhowerSelf - President of the United States (archive footage) | Self - President of the United States (archive footage) |