John Glenn goes on another journey into outer space for tests on how old age is affected there. His whole life is chronicled in this informative documentary, from his first mission above to his experience as a senator and finally, his blast into space at age 77.
| Actor | Role |
|---|---|
 John GlennHimself | Himself |
| KKurt BrownHimself | Himself |
 Scott CarpenterHimself | Himself |
| LLyn FreedmanHerself | Herself |
| AAnnie GlennHerself | Herself |
| DDavid GlennHimself | Himself |
| DDaniel GoldinHimself | Himself |
| SSteve LindsayHimself | Himself |
| RRichard LinnehanHimself | Himself |
| LLisa MaloneHerself | Herself |
| TThomas MillerHimself | Himself |
| SScott E. ParazynskiHimself | Himself |
| JJohn PikeHimself | Himself |
| SSteven RobinsonHimself | Himself |
| EEdward StoneHimself | Himself |
| FFrank Van RiperHimself | Himself |
| MMarcia SmithHerself | Herself |
 Timothy BottomsNarrator | Narrator |