Doctor Who - The Armageddon Factor (6)

Seizoen: 16 - Aflevering: 999 / 518 - Eerst uitgezonden: 24 februari 1979 - Episode ID: 384816

The quest is nearly over: the Doctor needs only to find the Sixth Segment of the Key to Time. It seems to be located on Atrios, a planet locked in all-out nuclear war with its neighbour, Zeos. But how far is the Doctor prepared to go to complete his mission? And agents of the Black Guardian have been hunting for the Key, too...