Virgil W. Vogel
Director
Arthur C. Pierce
Story
Arthur C. Pierce
Screenplay
Harry Arnold
Original Music Composer
Hilding Bladh
Director of Photography
Tom Rolf
Editor
Bertil Jernberg
Producer
Gustaf Unger
Co-Producer
Odert von Schoultz
Special Effects
Shirley Cytron
Editor
Allan Johansson
Original Music Composer
Nils Nilsson
Art Direction
Barbara Wilson
Diane Wilson
Sten Gester
Erik Engström
Robert Burton
Dr. Frederick Wilson
Bengt Blomgren
Col. Robert Bottiger
Åke Grönberg
Dr. Henrik
John Carradine
Narrator (US Re-Edit)
Gösta Prüzelius
Dr. Walter Ullman
Brita Borg
Singer (uncredited)
Doreen Denning
Anna (uncredited)
Ittla Frodi
Girlfriend in Volvo (uncredited)
Lars Åhrén
The Monster (uncredited)
Steve Conte
American Radio Supervisor #2 (US TV version) (uncredited)
Fred Hoffman
Doctor (US TV version) (uncredited)
Allan Johansson
(uncredited)
G.J. Mitchell
Diane's Psychiatrist (US TV version) (uncredited)
Chuck Niles
Second Doctor (US TV version) (uncredited)
Gustaf Unger
Air Passenger with Dark Glasses (uncredited)
Katherine Victor
Diane's Mother (US TV version) (uncredited)
