The Invasion of Time: Part Six
Doctor Who: Season 15, Episode 26
>
Stor, the Sontaran leader, finally gains access to the TARDIS in search of the Great Key of Rassilon and a dangerous game of hide and seek begins inside the Doctor's ship.
Show: Doctor Who
Air date: March 11, 1978
Directed by: Gerald Blake
First broadcast: 4 February – 11 March 1978
Music by: Dudley Simpson
Written by: "David Agnew" (Graham Williams and Anthony Read)