Gordon Douglas
Director
George Bruce
Screenplay
Bertram Millhauser
Story
Grant Whytock
Producer
George Robinson
Director of Photography
Dorothy B. Cormack
Script Supervisor
Edward P. Lambert
Wardrobe Supervisor
Ken Lobben
Still Photographer
William Dalton
Grip
Edward Colman
Camera Operator
John R. Carter
Sound
Ridgeway Callow
Assistant Director
Joseph Small
Unit Manager
Norbert A. Myles
Makeup Artist
Margaret Martin
Hairstylist
Howard Bristol
Set Decoration
Rudolph Sternad
Art Direction
James E. Newcom
Editor
Paul Sawtell
Original Music Composer
Edward Small
Producer
Louis Hayward
Philip 'Scotty' Grayson
Dennis O'Keefe
Daniel F. O'Hara
Louise Allbritton
Dr. Anastasia 'Toni' Neva
Carl Esmond
Dr. Ritter von Stolb
Onslow Stevens
Igor Braun
Raymond Burr
Krebs
Art Baker
Dr. Frederick Townsend
Lowell Gilmore
Dr. William Forrest
Philip Van Zandt
Anton Radchek
Charles Evans
Dr. Homer Allen
Frank Ferguson
Carl Bemish
Reed Hadley
Narrator (voice)
Ray Teal
Police Sergeant
William Tannen
FBI Chemist
Gale Storm
Voice on Tape Recorder
Arthur Space
Mr. North
Tamara Shayne
Mrs. Ecko, the Landlady
Keith Richards
FBI Agent Miller
Grandon Rhodes
Adolph Mizner
Steve Pendleton
Police Detective Gaines
Howard Negley
Feodore
Jimmy Lloyd
FBI Agent Alison
Myron Healey
FBI Agent Thompson
John Hamilton
G.W. Hunter
Paul Bryar
Fred Coby
Bert Davidson
Marten Lamont
Lee Phelps
Suzanne Ridgway
Arthur Tovey
Crane Whitley
