Plot
On the eve of May Day, dark elemental forces begin to disturb the village of Devil's End as the Master summons the demon Azal: unexplained murders, a stone gargoyle come to life, and a nigh-impenetrable infernal energy dome. With the Master fully prepared to destroy the Earth, the Doctor and UNIT - aided by a benevolent practitioner of witchcraft - battle the wicked rites of a secret science wielded by an alien from another world.
Trailer
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Cast
Jon Pertwee
The Doctor
Katy Manning
Jo Grant
Nicholas Courtney
Brigadier Lethbridge-Stewart
Richard Franklin
Captain Mike Yates
John Levene
Sergeant Benton
Roger Delgado
The Master
Stephen Thorne
Azal
Stanley Mason
Bok
Damaris Hayman
Miss Hawthorne
Don McKillop
Bert the Landlord
Rollo Gamble
Winstanley
Robin Wentworth
Prof. Horner
David Simeon
Alastair Fergus
James Snell
Harry
John Joyce
Garvin
Eric Hillyard
Dr. Reeves
Jon Croft
Tom Girton
Christopher Wray
PC Groom
Gerald Taylor
Baker's Man
Alec Linstead
Sgt. Osgood
John Owens
Thorpe
Matthew Corbett
Jones
