X: The Unknown

Army radiation experiments awaken a subterranean monster from a fissure that feeds on energy and proceeds to terrorise a remote Scottish village. An American research scientist at a nearby nuclear plant joins with a British investigator to discover why the victims were radioactively burned and why, shortly thereafter, a series of radiation-related incidents are occurring in an ever-growing straight line away from the fissure.

• Jimmy SangsterScreenplay
• Leslie NormanDirector
• James BernardOriginal Music Composer

• Dean JaggerDr. Adam Royston
• Leo McKernInspector McGill
• William LucasPeter Elliott
• Edward ChapmanJohn Elliott
• John HarveyMaj. Cartwright
• Michael RipperSgt. Harry Grimsdyke
• Anthony NewleyLCpl. 'Spider' Webb
• Ian MacNaughtonPvt. Haggis
• Peter HammondLt. Bannerman
• Kenneth CopePvt. Lansing
• Michael BrookeWillie Harding
• Frazer HinesIan Osborn