After a mysterious explosion leaves a large fissure in the ground, two young boys are confronted by an unknown phenomenon that inflicts severe radiation burns on one of them. A spate of attacks at radiation establishments occur as the inexplicable life-form plunders radium stores. Dr Royston, an expert in atomic research, is brought in to explain this alien creature before it causes disaster. Directed by Leslie Norman and Joseph Losey. Written by Jimmy Sangster, Hammer Films production manager. Starring Dean Jagger and Edward Chapman. Click for other version of poster