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81 minutes exactly โ the "classic feature" runtime most directors aim for.

"It rises from 2000 miles below the earth to melt everything in its path!"
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.
โIt rises from 2000 miles below the earth to melt everything in its path!โ

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
Credits
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Cinephile deep dive
Leslie Norman directs. Gerald Gibbs behind the camera. James Bernard scores. James Needs cuts. Runs lean at under 100 minutes. Produced in United Kingdom. Dialogue in English.
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Hammer Film Productions
GB
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Release history ยท US
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