Picking up a distress call from the edge of the known universe, the Doctor and Sarah Jane find themselves on Zeta Minor where a geological team has run afoul of some strange goings on...
Released: Oct 18, 1975
Runtime: 100 minutes
Genre: Science Fiction, Drama, Adventure
Stars: Tom Baker, Elisabeth Sladen, Frederick Jaeger, Ewen Solon, Prentis Hancock, Graham Weston
Crew: Louis Marks (Writer), David Maloney (Director), Dudley Simpson (Original Music Composer), Philip Hinchcliffe (Producer), Robert Holmes (Script Editor)