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...
Doctor Who: Planet of Evil (1975) is currently not available on any services.
Tom Baker , Elisabeth Sladen , Frederick Jaeger , Ewen Solon , Prentis Hancock , Louis Mahoney
David Maloney
BBC