Dragonfire is the fourth and final serial of the 24th season of the British science fiction television series Doctor Who, which was first broadcast in three weekly parts from 23 November to 7 December 1987. This serial marked the departure of Bonnie Langford as Mel Bush and the introduction of Sophie Aldred as companion Ace.

The Happiness Patrol is the second serial of the 25th season of the British science fiction television series Doctor Who, which was first broadcast in three weekly parts on BBC1 from 2 to 16 November 1988.