Onboard a spaceship an astrophysicist and a priest learn they have discovered a planet long dead and a transmitter emitting a signal for eons.
| Name | Type | Role | |
|---|---|---|---|
| Arthur C. Clarke | Writer | ||
| Alan Brennert | Writer | ||
| Fritz Weaver | Guest Star | ||
| Donald Moffat | Guest Star | ||
| Elizabeth Huddle | Guest Star | ||
| Gerd Oswald | Director |