An energy drain traps the Third Doctor and Sarah Jane Smith on the planet Exxilon with its hostile natives, causing the travellers to make an uneasy alliance with a Marine Space Corps expedition and a squadron of Daleks. The key to escape for all of them lies at the heart of a powerful and mysterious lost city, but only after a series of deadly traps.

• DirectorMichael E. Briant
• Release16 March 1974
• Genre
  Drama / Action
• Duration1h 40m
• Budget?
• Revenue?
• Rate
  

  6.2
  4 reviews
• Productions

  BBC