A spaceship from Earth lands on the planet Venus, and encounters a race of beings that the crew begins to suspect are descended from the lost city of Atlantis.
| Actor | Role |
|---|---|
 Norman WoolandDr. Ballantyne | Dr. Ballantyne |
| MMandy HarperPat | Pat |
 Robin StewartJim | Jim |
 Robin HunterPeter | Peter |
 Patrick KavanaghMike | Mike |
 Arnold DiamondImos | Imos |