The Doctor, Vicki and Steven arrive on an arid planet where they meet the beautiful Drahvins and the hideous Rills. Each has crash-landed after a confrontation in space. The Rills are friendly, compassionate explorers. The Drahvins are dull-witted, cloned soldiers, terrorised by the intelligent, warlike matriarch Maaga.

Science Fiction, Adventure, Drama

William Hartnell, Maureen O'Brien, Peter Purves, Stephanie Bidmead, Marina Martin, Susanna Carroll