In this feature-length space story the Doctor, Harry and Sarah arrive on an artificial satellite where the survivors of Earth lie in cryo-genic suspension, waiting for a new life. But the Doctor soon discovers there has been a sinister intrusion and some of the survivors are not now what they seem......
Commentary by Tom Baker, Elisabeth Sladen and producer Philip Hinchcliffe; Alternative version with new CGI effects; Unused title sequence; Trailer; Interview with designer Roger Murray-Leach; 1974 interview with Tom Baker; 'Tardis-cam' footage from BBC website; 3D CGI technical schematic; Gallery; Production information; Easter eggs
Release Date: 08 April 2002
Certificate: U - Universal - Suitable for all
Aspect ratio: Full screen
Main language: English
Production year: 1974
Running time: 98 minutes