Three astronauts were launched into space aboard a rocket designed by Professor Quatermass (Brian Donlevy), but the spacecraft returns to earth with only one occupant, Victor Carroon (Richard Wordsworth). Something has infected him during the spaceflight, and he begins mutating into an alien organism which, if it spawns, will engulf the Earth and destroy humanity. When the Carroon-creature escapes from custody, Quatermass and Scotland Yard’s Inspector Lomax (Jack Warner), have just hours to track it down and prevent a catastrophe.
“The Quatermass Xperiment” (a.k.a. “The Creeping Unknown” in the U.S.) is a Hammer Films Production based on a 1953 BBC Television serial by Nigel Kneale, called “The Quatermass Experiment.” The film produced by Anthony Hinds, directed by Val Guest, stars Brian Donlevy, Jack Warner, Richard Wordsworth, and Margia Dean.
[Source: Wikipedia]
Movie trailer: www.youtube.com/watch?v=mlygJ9VfhVo