Poster of Doctor Who - Season 15 - Episode 26 - The Invasion of Time (6)

Doctor Who - Season 15 - The Invasion of Time (6) (Episode 26)

Plot: The Sontarans finally invade the TARDIS itself, seeking the Great Key. The Doctor, however, has other uses for this powerful object…
Episode Aired On:
Saturday, March 11 1978
46 years ago