Reparto y equipo

Roy Ward Baker

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

Anthony Nelson Keys

Tristram Cary

Arthur Grant

Spencer Reeve