Prof. Bernard Quatermass
Brian Donlevy
Chief Inspector Lomax
John Longden
E. J. Macleod
John Rae
Lab Assistant
Philipp Baird
Kelly
Betty Impey
Woman Member of Parliament
Joyce Adams
Peterson
Edwin Richfield
Sheila
Vera Day
Miss Beal
Marianne Stone
Mrs. McLeod
Jane Aird
Harry
Michael Balfour
The Police Commissioner
John Stuart
Dr. Tom Brand
William Franklyn
Intern
John Fabian
Super
George Merritt
Chris (uncredited)
Barry Lowe
Marsh
Bryan Forbes
Work Camp Manager Dawson
Charles Lloyd Pack
Vincent Broadhead, M.P.
Tom Chatto
The Plant Tour Guide
John Van Eyssen
Jimmy Hall
Sid James
Paddy Gorman
Percy Herbert
Ernie the Bartender
Michael Ripper
Director
Val Guest
Screenplay
Nigel Kneale
Teleplay
Executive Producer
Michael Carreras
Director of Photography
Gerald Gibbs
Producer
Anthony Hinds
Makeup Artist
Philip Leakey
Art Direction
Bernard Robinson
Editor
James Needs
Original Music Composer
James Bernard
Special Effects
Bill Warrington
Henry Harris
Wardrobe Supervisor
Rene Coke
Assistant Director
Don Weeks
Music Director
John Hollingsworth
Frank George
Production Supervisor
Anthony Nelson Keys
Production Manager
John Workman