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.
Tom Baker
The Doctor
Louise Jameson
Leela
Chris Tranchell
Andred
Milton Johns
Castellan Kelner
Dennis Edwards
Lord Gomer
Reginald Jessup
Lord Savar
Charles Morgan
Gold Usher
John Leeson
K9 (voice)
