Doctor Who: Galaxy 4

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.

• Director: Derek Martinus
• Cast: William Hartnell, Maureen O'Brien, Peter Purves, Stephanie Bidmead, Marina Martin, Susanna Carroll, Lyn Ashley, Jimmy Kaye