Sontaran Field Major Styre is conducting experiments on the survivors of future Earth in preparation of a full-scale Sontaran invasion of the planet. Can the Doctor defeat Styre and save the world?
Released: 1975-03-01
Runtime: 50 minutes
Genre: Science Fiction, Drama, Adventure
Stars: Glyn Jones, Tom Baker, Donald Douglas, Terry Walsh, Elisabeth Sladen, Peter Walshe, Ian Marter, Peter Rutherford, Kevin Lindsay