The 4th Doctor (Tom Baker) and crew finds a group of shipwrecked astronauts lured by a fake distress call from an alien conducting gruesome experiments on human physical and mental endurance as a prelude to an invasion of Earth!
Special Features:
- Commentary by Actor Elisabeth Sladen, Producer Philip Hinchcliffe, and Writer Bob Baker
- Built For War documentary – the genesis and development of the Sontaran race through the history of the series
- Photo Gallery
- Production Subtitles
- Digitally remastered picture and sound quality