X the Unknown
- Release Year
- 1956
- Runtime
- 1h 21m
- Genres
- Horror
- Mystery
- Science Fiction
- Directed By
- Leslie Norman

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.











