The Doctor and UNIT investigate a deadly infection lurking underneath the Welsh mining town of Llanfairfach. It's an adventure that will change Jo Grant's life forever...
Released: Jun 23, 1973
Runtime: 150 minutes
Genre: Science Fiction, Drama, Adventure
Stars: Jon Pertwee, Katy Manning, Nicholas Courtney, John Levene, Richard Franklin, Stewart Bevan
Crew: Robert Sloman (Writer), Michael E. Briant (Director), Dick Mills (Special Sound Effects), Terry Walsh (Stunt Coordinator), Barry Letts (Producer), Bill Matthews (Camera Operator)