Image for X: The UnknownNot currently available on BBC iPlayer

Duration: 1 hour, 17 minutes

A radioactive mud-like substance terrorises a Scottish village during the 1950s.

Last on

Sun 13 Oct 2013 00:45 BBC Two


Dr Adam Royston
Dean Jagger
Inspector McGill
Leo McKern
John Elliott
Edward Chapman
Lieutenant Corporal 'Spider' Webb
Anthony Newley
Jack Harding
Jameson Clark
Peter Elliott
William Lucas
Lieutenant Bannerman
Peter Hammond
Zena, the Nurse
Marianne Brauns
Ian McNaughton
Sergeant Harry Grimsdyke
Michael Ripper
Leslie Norman
Executive Producer
Michael Carreras
Anthony Hinds


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