as Henry Errington

as Muller

as Lord Fawnlee

as Quemot

as Collings

as Walter Bray

as Detective-Sergeant Leith

as Old Ekdal

as Edmund Newton

as Infantry General at Field Briefing (uncredited)

as Jason Douglas

as Sidney Fairweather

as Archdeacon Pomphret

as Professor Gouin

as Squire Dale

as Lloyd Crichton

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