| Actor | Role |
|---|---|
| TTerry MacDonaldNarrator (voice) | Narrator (voice) |
 John F. KennedySelf - President of the United States (archive footage) | Self - President of the United States (archive footage) |
 Jim LovellSelf - Captain, NASA Astronaut | Self - Captain, NASA Astronaut |
| SShannon LucidSelf - NASA Astronaut | Self - NASA Astronaut |
 Yuri GagarinSelf - Soviet Cosmonaut (archive footage) | Self - Soviet Cosmonaut (archive footage) |
| AAlan ShepardSelf - NASA Astronaut (archive footage) | Self - NASA Astronaut (archive footage) |
 Gus GrissomSelf - NASA Astronaut (archive footage) | Self - NASA Astronaut (archive footage) |
 Gherman TitovSelf - Soviet Cosmonaut (archive footage) | Self - Soviet Cosmonaut (archive footage) |
| RRoger K. CrouchSelf - NASA Astronaut | Self - NASA Astronaut |
 John GlennSelf - NASA Astronaut (archive footage) | Self - NASA Astronaut (archive footage) |
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