as Muller

as Lord Fawnlee

as Collings

as Detective-Sergeant Leith

as Edmund Newton

as Infantry General at Field Briefing (uncredited)

as Jason Douglas

as Sidney Fairweather

as Archdeacon Pomphret

as Professor Gouin

as Berkeley Reckitt

as Secretary

as Professor Bernard Quatermass

as Prof. Martineau / Mansel

as Linnett

as Dr. Braithwaite

as Oliver Farrant

as Dr. Bruce Napier

as Pilot

as Unnamed Character

as Donald Scarlett

as Taylor