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Mel and Pex play cat and mouse with the lethal cleaner robots while the Doctor and the surviving Kangs learn all about Kroagnon the Great Architect.
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
