| Cast list | | Don Murray | as | Dr. Alex Lauder | | Ray Milland | as | Professor Samuel Constable | | Gene Tierney | as | Lenore Constable | | Barbara Dana | as | Tina Cryder | | Edward Asner | as | Saul Wiener | | Pamelyn Ferdin | as | Mary Constable | | Ivor Barry | as | Dr. Paul Cryder | | William Beckley | as | Arnold Bessmer | | George Macready | as | Dr. Frank Ferguson | | John Carradine | as | Mr. Bosch | | Virginia Christine | as | Helga | | Cecile Ozorio | as | Devi Bessmer | | Frank Maxwell | as | Gen. Augstedt | | Bill Hickman | as | Enemy agent | | Hal Frederick | as | Technician |
| | Crew list: | | Walter Grauman (Director) | | Paul Gallico (Writer) | | Luther Davis (Writer) |
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