

The Doctor and Adric learn from the wizened Keeper of Traken that a great evil has come to his planet in the form of a Melkur - a calcified statue. The Keeper of Traken is nearing the end of his reign and seeks the Doctor's help in preventing the evil from taking control of the bioelectronic source that is the keystone of the Traken Union's civilisation.
Director: John Black

The Doctor

Adric

Nyssa

Melkur (voice) / The Master

Tremas / The Master

Kassia
The Keeper

Seron
Katura

Luvic