Diretor/a
Roy Ward Baker
DIRETOR/A
Elenco (na ordem dos créditos)
James Donald
Doctor Roney
Andrew Keir
Quatermass
Barbara Shelley
Barbara Judd
Julian Glover
Colonel Breen
Duncan Lamont
Sladden
Bryan Marshall
Captain Potter
Peter Copley
Howell
Edwin Richfield
Minister
Grant Taylor
Police Sergeant Ellis
Maurice Good
Sergeant Cleghorn
Robert Morris
Watson
Sheila Steafel
Journalist
Hugh Futcher
Sapper West
Hugh Morton
Elderly Journalist
Thomas Heathcote
Vicar
Noel Howlett
Abbey Librarian
Hugh Manning
Pub Customer
June Ellis
Blonde
Keith Marsh
Johnson
James Culliford
Corporal Gibson
Bee Duffell
Miss Dobson
Roger Avon
Electrician
Brian Peck
Technical Officer
John Graham
Inspector
Charles Lamb
Newsvendor
Ann Barrass
Commuter(uncredited)
Roy Beck
Student archaeologist(uncredited)
Peter Bennett
London Transport Official(uncredited)
Bette Bourne
Second Electrician(uncredited)
John Bown
TV Interviewer(uncredited)
Simon Brent
Orderly Officer(uncredited)
Douglas Cooper
Fleeing Man(uncredited)
David Crane
Institute Attendant(uncredited)
William Ellis
Journalist(uncredited)
Mark Elwes
Second Technician(uncredited)
Harry Fielder
Possessed Man(uncredited)
George Fisher
Man in Bar(uncredited)
Joseph Greig
Pub Customer(uncredited)
Fred Haggerty
Patrick Halpin
Tube Train Passenger(uncredited)
George Hilsdon
Barman(uncredited)
Walter Horsbrugh
Messenger(uncredited)
Alastair Hunter
Institute Doorkeeper(uncredited)
Philip Johns
Policeman(uncredited)
Elroy Josephs
Black Workman(uncredited)
Cyril Kent
Eric Kent
Sapper(uncredited)
Dickey Luck
Rosalind Mendleson
George Oliver
James Payne
Man Running from Station(uncredited)
Michael Poole
Older Workman(uncredited)
Eddie Powell
Mike Reid
John Rutland
Second London Transport Official(uncredited)
Harold Sanderson
David Savile
Army Officer(uncredited)
Bill Sawyer
Albert Shepherd
Loader(uncredited)
Leslie Southwick
Gareth Thomas
Other Workman(uncredited)
Harry Tierney
Graham Tonbridge
Official Watching Video(uncredited)
Mickey Varey
Brian Walton
Ian White
TV Announcer(uncredited)