"Quatermass Xperiment" (1955) A Hammer House Production, Produced at Bray Studios

The Quatermass Xperiment concerns three astronauts who have been launched into space aboard a single-stage-to-orbit rocket designed by Professor Quatermass. It crashlands with only one of its original crew, Victor Carroon (Richard Wordsworth), still aboard. He begins mutating into an alien organism, which, if it spawns, will engulf the Earth and destroy humanity. After Carroon escapes from custody Quatermass and Inspector Lomax (Jack Warner) of Scotland Yard have just hours to track him/it down and prevent a catastrophe.