Director
Gordon Douglas
DIRECTOR
Stars (in credits order)
Louis Hayward
Philip 'Scotty' Grayson
Dennis O'Keefe
Daniel F. O'Hara
Louise Allbritton
Dr. 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
Narratorvoice
Paul Bryar
Ivanuncredited
Fred Coby
Fred - FBI Chemistuncredited
Bert Davidson
Potter - FBI Agentuncredited
John Hamilton
G.W. Hunteruncredited
Myron Healey
Thompson - FBI Agentuncredited
Marten Lamont
FBI Chemistuncredited
Jimmy Lloyd
Alison - FBI Agentuncredited
Howard Negley
Feodoreuncredited
Steve Pendleton
Gaines - Police Detectiveuncredited
Lee Phelps
Copuncredited
Grandon Rhodes
Adolph Mizneruncredited
Keith Richards
Miller - FBI Agentuncredited
Suzanne Ridgway
Extra at Murder Sceneuncredited
Tamara Shayne
Mrs. Ecko - Landladyuncredited
Arthur Space
Mr. Northuncredited
Gale Storm
Mrs. Green - Voice on Tape Recorderuncredited,voice
William Tannen
Ray Teal
Police Sergeantuncredited
Arthur Tovey
Plant Workeruncredited
Crane Whitley
Curlyuncredited