Adventures and travels of a Time Lord known as the Doctor, who employs a time and space travel device in the shape of a typical British Police Box (Booth). "Castovalva", the Doctor's self healing powers may be damaged. The Doctor regenerates himself but the results might be fatal. The episode that launched the Peter Davison era of Who Dom. Director Fiona Cumming Star Peter Davison, Janet Fielding, Sarah Sutton, Matthew Waterhouse, Anthony Ainley Special Features: English Additional Release Material: Alternate Scenes, Deleted Scenes, Audio Commentaries: Peter Davison, Janet Fielding, Stars; Christopher H. Bidmead, Writer; Fiona Cr, Featurettes: "The Crowded TARDIS" (11 min.) Interviews: 1. Peter Davison - Star Star ("Being Doctor Who"; 13 minutes) DVD-ROM: Downloads, 1. 1982 Doctor Who Annual. Pdf 2. Radio Times Literature. Pdf 3. BBC Enterprises Literature. Pdf Runtime: 96 minutes Year of Release: 1982.