X the Unknown (1956)
- Duration: 01:21:00
- Year: 1956
- Rating: NR
- Cast: Dean Jagger, Edward Chapman, Leo McKern, Anthony Newley, Jameson Clark, William Lucas, Peter Hammond, Marianne Brauns, Ian MacNaughton, Michael Ripper, John Harvey, Edwin Richfield, Jane Aird, Norman MacOwan, Neil Hallett, Kenneth Cope, Michael Brooke, Frazer Hines, Max Brimmell, Robert Bruce, Angela Crow, Brown Derby, Raymond Dudley, Archie Duncan, Patrick Halpin, Arthur Howell, Lawrence James, Edward Judd, Stella Kemball, Jack Lambert, Philip Levene, Brian Peck, Anthony Sagar, Barry Steele, John Stevenson Lang, John Stirling, John Stone, French Taylor, Shaw Taylor, Neil Wilson
- Directors: Leslie Norman, Joseph Losey
- Writers: Jimmy Sangster, Jimmy Sangster
- Genre: Sci-Fi|Monster, Sci-Fi, Sci-Fi|Hammer Films, Sci-Fi|Atoms and Radiation, Sci-Fi|Creature Features, Sci-Fi|Apocalypse, Sci-Fi|Horror, Horror
A subterranean radioactive entity wreaks havoc at a remote military base in the Scottish Highlands. The British Army is mobilized to confront this terrifying threat. Will they succeed in neutralizing this dangerous entity before it's too late?