Prof. Bernard Quatermass
Dr. Mathew Roney
Barbara Judd
Colonel Breen
Captain Potter
Sergeant Cleghorn
Sladden
Howell
Minister
Police Sergeant Ellis
Abbey Librarian
Vicar
Jerry Watson
Miss Dobson
Journalist
Sapper West
Elderly Journalist
Pub Customer
Blonde
Johnson
Corporal Gibson
Electrician
Technical Officer
Inspector
Newsvendor
Army Officer
Journalist
Workman (uncredited)
Black Workman (uncredited)
Older Workman (uncredited)
Loader (uncredited)
Man Running from Station (uncredited)