X the UnknownBBC Two Duration: 1 hour, 16 minutesFirst broadcast: Sun 13th Oct 2013, 00:45 on BBC Two HDLatest broadcast: Sun 16th Oct 2016, 01:45 on BBC Two HDA radioactive mud-like substance terrorises a Scottish village during the 1950s.ContributorsDr Adam Royston:Dean JaggerInspector McGill:Leo McKernJohn Elliott:Edward ChapmanPeter Elliott:William LucasLieutenant Bannerman:Peter HammondLance Corporal "Spider" Webb:Anthony NewleyJack Harding:Jameson ClarkZena, the Nurse:Marianne BraunsHaggis:Ian McNaughtonSergeant Harry Grimsdyke:Michael RipperMajor Cartwright:John HarveyDirector:Leslie NormanExecutive Producer:Michael CarrerasProducer:Anthony HindsWriter:Jimmy SangsterGenresDramaSciFi & FantasyFormatsFilms Source: BBC Online