Peter Cushing
Dr. Brian Stanley
Peter Cushing
Dr. Brian Stanley
Edward Judd
Dr. David West
Carole Gray
Toni Merrill
Eddie Byrne
Dr. Reginald Landers
Sam Kydd
Constable John Harris
Niall MacGinnis
Mr. Roger Campbell
James Caffrey
Peter Argyle
Liam Gaffney
Ian Bellows
Keith Bell
Halsey
Margaret Lacey
Old Woman
Peter Forbes-Robertson
Dr. Lawrence Phillips
Shay Gorman
Morton
Richard Bidlake
Carson
Edward Ogden
Helicopter Pilot
Joyce Hemson
Mrs. Bellows
Roger Heathcott
Dunley
Al Ramsen
Screenplay
Terence Fisher
Director
Edward Mann
Screenplay
John Earl
Art Direction
Reginald H. Wyer
Director of Photography
Richard Gordon
Executive Producer
Rosemary Burrows
Costume Design
Tom Blakeley
Producer
Malcolm Lockyer
Original Music Composer
Gerald A. Fernback
Executive Producer
Thelma Connell
Editor