• 
  Peter Brocco

  Dr. Gustav
• 
  William Schallert

  Johnston, a reporter
• 
  Charles Sherlock

  Military Man
• 
  Taylor Holmes

  Prof. Arnold Nordstrom
• 
  Steven Geray

  The Foreign Spy-Chief
• 
  Hal Baylor

  Max (spy-henchman)
• 
  Lyle Talbot

  An Admiral

• 
  Gabriel Scognamillo

  art director

• 
  John L. Russell

  imagine
• 
  Howard Jackson

  departament sunet
• 
  Basil Wrangell

  montaj
• 
  Richard Goldstone

  producător
• 
  Edward G. Boyle

  set decorator
• 
  John McCarthy Jr.

  set decorator
• 
  Howard Lydecker

  special effects

• 
  Philip MacDonald

  scriitor