

Plot
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.
Cast

Dean Jagger
Dr. Adam Royston

Leo McKern
Inspector McGill

William Lucas
Peter Elliott

Edward Chapman
John Elliott

John Harvey
Maj. Cartwright

Michael Ripper
Sgt. Harry Grimsdyke

Anthony Newley
LCpl. 'Spider' Webb

Ian MacNaughton
Pvt. Haggis

Peter Hammond
Lt. Bannerman

Kenneth Cope
Pvt. Lansing
Michael Brooke
Willie Harding

Frazer Hines
Ian Osborn
Crew
Leslie Norman
Director
Jimmy Sangster
Screenplay
Anthony Hinds
Producer
James Bernard
Original Music Composer
Gerald Gibbs
Director of Photography
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