Low-budget black and white sci-fi thriller from Hammer films. Mysterious events surround the sudden appearance of a gaping fissure at a remote Scottish army base: soldiers on manoeuvres nearby develop a debilitating sickness, while a small boy is engulfed by an eerie presence. The radioactive, subterranean monstrosity seems to have been brought to life by recent atomic experiments - but can it ever be destroyed?
Director: Leslie Norman
Producer: Anthony Hinds
Writer: Jimmy Sangster
Music: James Bernard
Cinematographer: Gerald Gibbs
Actor: Dean Jagger
Actor: Edward Chapman
Actor: Leo McKern
Actor: Anthony Newley
Actor: Jameson Clark
Actor: William Lucas
Actor: Marianne Brauns
Actor: John Harvey
Actor: Peter Hammond
Actor: Michael Ripper