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.

• DirectorChristopher Barry
• Release19 June 1971
• Genre
  Science Fiction / Drama
• Duration2h 5m
• Budget?
• Revenue?
• Rate
  

  7.5
  7 reviews
• Productions

  BBC