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