The Doctor and companions are summoned back to Earth by the Brigadier to solve a mysterious crisis: a series of North Sea oil rigs are being systematically destroyed. What sinister force lies behind the devastation?
Directed by Douglas Camfield
Written by Robert Banks Stewart
Starring Tom Baker, Elisabeth Sladen, Ian Marter
Directed by Douglas Camfield
Written by Robert Banks Stewart
Starring Tom Baker, Elisabeth Sladen, Ian Marter