The first manned spacecraft, fired from an English launchpad, is first lost from radar, then roars back to Earth and crashes in a farmer's field, and is found to contain only one of the three men who took off in it; and he is unable to talk but appears to be undergoing a torturous physical and mental metamorphosis.
Brian Donlevy
as Prof. Bernard Quatermass
Richard Wordsworth
as Victor Carroon
David King-Wood
as Dr. Gordon Briscoe
Jack Warner
as Inspector Lomax
Margia Dean
as Judith Carroon
Harold Lang
as Christie
Lionel Jeffries
as Blake
Thora Hird
as Rosie Wrigley
Gordon Jackson
as BBC TV producer
Sam Kydd
as Police Sergeant Questioning Rosie
Maurice Kaufmann
as Marsh (uncredited)
John Wynn
as Detective Sergeant Best (uncredited)
