![](https://image.tmdb.org/t/p/w342/xinqAmYrZ1TEwowcQhgTkZVtVE0.jpg)
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Louise Jameson (Leela), Colin Baker (The Doctor), Katy Manning (Jo), Sarah Sutton (Nyssa), Janet Fielding (Tegan), Matthew Waterhouse (Adric), Betsan Roberts (wife of late director Pennant Roberts), and Toby Hadoke get to grips with a mysterious skull, an alien menace, and a priory full of mad scientists.
First Air Date : Nov 23, 1963
Last Air date : Dec 06, 1989
Episode : 694 Episode
Season : 26 Season
Runtime: 48 minutes
Studio: BBC One, BBC Television
Country: United Kingdom
Cast: Sylvester McCoy