An alien narrates the story of his dying planet, his and his people's visitations to Earth and Earth's self-made demise, while human astronauts in space are attempting to find an alternate planet for surviving humans to live on.
| Actor | Role |
|---|---|
 Brad DourifAlien | Alien |
| DDonald WilliamsAstronaut Commander | Astronaut Commander |
| EEllen BakerAstronaut physician | Astronaut physician |
 Franklin Chang-DiazAstronaut Plasma Physicist | Astronaut Plasma Physicist |
| SShannon LucidAstronaut biochemist | Astronaut biochemist |
| MMichael McCulleyAstronaut pilot | Astronaut pilot |
| RRoger DiehlMathematician | Mathematician |
| MMartin LoMathematician | Mathematician |
| TTed SweetserMathematician | Mathematician |