The Stranger and Miss Brown visit Majus 17 a intergalactic tourist paradise. However, they soon discover all is not as it seems - as they find decaying corpses in the woods and bathers are being swallowed by an angry sea.
| Actor | Role |
|---|---|
 Sophie AldredGirl | Girl |
 Colin BakerThe Stranger | The Stranger |
| JJulian BooteThe Ape | The Ape |
 Nicola BryantMiss Brown | Miss Brown |
| NNigel FairsNic | Nic |
 Peter MilesBernard Darton | Bernard Darton |
 Barbara ShelleyCharlotte Darton | Charlotte Darton |
| MMark TrotmanMark | Mark |