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Last updated: 05 Jun 2026 at 11:05 UTC

X: The Unknown (1956)

Cinafilm Score = 55% based on 25 reviews

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.

X: The Unknown has generally received mixed reviews.

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