Full Credits
13 members

Howard Duff
Dr. Stephen Mitchell

Eva Bartok
Dr. Lisa Frank

Alan Wheatley
Dr. Smith
Philip Leaver
Professor Koepler

Michael Medwin
Dr. Toby Andrews

Andrew Osborn
Dr. Philip Crenshaw
Cecile Chevreau
Vanessa Mitchell

Anthony Ireland
General Hayes

Hugh Moxey
Colonel Alfred Daniels

David Horne
Minister
Leo Phillips
Sergeant Peterson (uncredited)

Marianne Stone
Mrs. Rogers (uncredited)
Jean Webster-Brough
Mrs. Daniels (uncredited)
20 members
Terence Fisher
Director
RenΓ©e Glynne
Script Supervisor
Jimmy Sangster
Assistant Director
Paul Tabori
Screenplay
Richard H. Landau
Screenplay
Paul Tabori
Adaptation
Michael Carreras
Producer
Victor Wark
Production Manager
Robert L. Lippert
Producer
Len Harris
Camera Operator
Reginald H. Wyer
Director of Photography
Ivor Slaney
Music Director
Ivor Slaney
Original Music Composer
Bill Salter
Sound Recordist
J. Elder Wills
Art Direction
Polly Young
Hairstylist
Dick Bonnor-Morris
Makeup Artist
Maurice Rootes
Editor
Charles Eric Maine
Radio Play
Nora Roberts
Dialogue Coach