Val Guest Director, Screenwriter Brian Donlevy Prof. Bernard Quatermass Actor Jack Warner Insp. Lomax Actor Margia Dean Mrs. Judith Carroon Actor Richard Wordsworth Victor Carroon Actor David King-Wood Dr. Gordon Briscoe Actor Thora Hird Rosemary "Rosie" Elizabeth Wrigley Actor Gordon Jackson BBC TV producer Actor Harold Lang Christie Actor Lionel Jeffries Blake Actor Maurice Kaufmann Marsh Actor Frank Phillips BBC Announcer Actor Nigel Kneale Screenwriter Richard H. Landau Screenwriter Anthony Hinds Producer Walter J. Harvey Cinematographer James Needs Film Editing James Bernard Original Music