STORYLINE

Only a few years from now, a squad of UNIT troops is escorting a nuclear missile through the English countryside. At the nearby archaeological dig, knights in armor are fighting battles with broadswords — and guns and grenades.

The Doctor arrives on the scene and meets two old friends: Brigadier Lethbridge-Stewart, called out of retirement to help in the emergency, and Bessie the souped-up roadster.

Ace escapes from death by drowning in a submerged spaceship, only to find herself at the mercy of a demon known as the Destroyer.