Andrew Keir
Prof. Bernard Quatermass
Acting
James Donald
Dr. Mathew Roney
Acting
Barbara Shelley
Barbara Judd
Acting
Julian Glover
Colonel Breen
Acting
Bryan Marshall
Captain Potter
Acting
Maurice Good
Sergeant Cleghorn
Acting
Duncan Lamont
Sladden
Acting
Peter Copley
Howell
Acting
Edwin Richfield
Minister
Acting
Grant Taylor
Police Sergeant Ellis
Acting
Noel Howlett
Abbey Librarian
Acting
Thomas Heathcote
Vicar
Acting
Robert Morris
Jerry Watson
Acting
Bee Duffell
Miss Dobson
Acting
Sheila Steafel
Journalist
Acting
Hugh Futcher
Sapper West
Acting
Hugh Morton
Elderly Journalist
Acting
Hugh Manning
Pub Customer
Acting
June Ellis
Blonde
Acting
Keith Marsh
Johnson
Acting
James Culliford
Corporal Gibson
Acting
Roger Avon
Electrician
Acting
Brian Peck
Technical Officer
Acting
John Graham
Inspector
Acting
Charles Lamb
Newsvendor
Acting
David Savile
Army Officer
Acting
William Ellis
Journalist
Acting
Gareth Thomas
Workman (uncredited)
Acting
Elroy Josephs
Black Workman (uncredited)
Acting
Michael Poole
Older Workman (uncredited)
Acting
Albert Shepherd
Loader (uncredited)
Acting