Cast
Andrew Keir
Prof. Bernard Quatermass
James Donald
Dr. Mathew Roney
Barbara Shelley
Barbara Judd
Julian Glover
Colonel Breen
Bryan Marshall
Captain Potter
Maurice Good
Sergeant Cleghorn
Duncan Lamont
Sladden
Peter Copley
Howell
Edwin Richfield
Minister
Grant Taylor
Police Sergeant Ellis
Noel Howlett
Abbey Librarian
Thomas Heathcote
Vicar
Robert Morris
Jerry Watson
Bee Duffell
Miss Dobson
Sheila Steafel
Journalist
