The Invasion of Time

097 – The Invasion of Time
Doctor Who serial
Cast
Others
Production
Directed byGerald Blake
Written by"David Agnew" (Graham Williams and Anthony Read)
Script editorAnthony Read
Produced byGraham Williams
Executive producer(s)None
Music byDudley Simpson
Production code4Z
SeriesSeason 15
Running time6 episodes, 25 minutes each
First broadcast4 February – 11 March 1978
Chronology
← Preceded by
Underworld
Followed by →
The Ribos Operation
List of episodes (1963–1989)

The Invasion of Time is the sixth and final serial of the 15th season of the British science fiction television series Doctor Who, which was first broadcast in six weekly parts on BBC1 from 4 February to 11 March 1978. It features the final appearance of Louise Jameson as the companion Leela.

In the serial, the Vardans break the defences of Gallifrey to allow the Sontarans to invade and control the power of the Time Lords.