Characters played by Don Murray
Dr. Alex Lauder
Characters played by Ray Milland
Professor Samuel Hale Constable
Characters played by Gene Tierney
Lenore Constable
Characters played by Barbara Dana
Tina Cryder
Characters played by Edward Asner
Saul Wiener
Characters played by Pamelyn Ferdin
Mary Constable
Characters played by William Beckley
Arnold Watson Bessmer
Characters played by Ivor Barry
Dr. Paul Cryder
Characters played by George Macready
Dr. Frank Ferguson
Characters played by John Carradine
Mr. Bosch
Characters played by Virginia Christine
Helga
Characters played by Cecile Ozorio
Devi Bessmer
Characters played by Frank Maxwell
General Augstadt
Characters played by Hal Frederick
C.I.C. Technician
Characters played by Bill Hickman
Enemy Agent
Characters played by Fritz Ford
(uncredited)
Characters played by Charles Seel
Cemetery Custodian