An accident strands Tom Hill in a shuttle between Earth and the Moon. The only person who can save him is Colonel Gararov, a Russian cosmonaut. However, to rescue Hill, Gararov would have to disobey the orders of his superior: General Trenkin, Commander of the Russian moon base.

• Terrance Dicks
• Barry Letts

• Garrick Hagon
• Michael Gough
• John Hallam