Andre Morell Professor Bernard Quatermass Actor Cec Linder Dr Matthew Roney Actor Anthony Bushell Colonel James Breen Actor John Stratton Captain Potter Actor Christine Finn Barbara Judd Actor Michael Ripper Segeant Actor Harold Goodwin Corporal Gibson Actor Clifford Cox First Private Actor Brian Worth James Fullalove Actor Richard Shaw Sladden Actor Rudolph Cartier Director, Producer Nigel Kneale Writer Ian Callaway Film Editor