The Doctor returns to Gallifrey, claims his rights and is inaugurated President. It soon turns out that he has led a group of aliens called Vardans to the planet to eradicate them completely. After they are destroyed, the Sontarans take their opportunity and follow them in their invasion until they are destroyed by the Doctor.
Full Cast of Doctor Who: The Invasion of Time
Derek Deadman
Stor
John Leeson
K9 (voice)
Crew of Doctor Who: The Invasion of Time
Full backstage crew list →- Released March 11, 1978