The present day: just as the Fourth Doctor and Leela arrive in Fetchborough, England, Professor Fendelman prepares to experiment on a fossilized skull which science says should not exist. The skull is actually an artefact of the Fendahl, a god-like being who feeds on the life force of others. It has begun to awaken and kill. Worse yet, others seek to exploit the Fendahl's dreadful power.
Tom Baker
as The Doctor
Louise Jameson
as Leela
Denis Lill
as Dr. Fendelman
Scott Fredericks
as Max Stael
Wanda Ventham
as Thea Ransome
Edward Arthur
as Adam Colby
Daphne Heard
as Martha Tyler
Geoffrey Hinsliff
as Jack Tyler
Edward Evans
as Ted Moss
Graham Simpson
as Hiker
Derek Martin
as David Mitchell
