• 
  Richard Gaines

  Prof. Jackson
• 
  Cameron Mitchell

  Steve Abbott
• 
  Robert Barrat

  Tillamar
• 
  Trevor Bardette

  Alzar
• 
  Edward Earle

  Justin
• 
  Morris Ankrum

  Ikron
• 
  Arthur Franz

  Dr. Jim Barker
• 
  John Litel

  Dr. Lane

• 
  Stanley Blystone

  Councilman

• 
  Marlin Skiles

  departament sunet
• 
  Walter Mirisch

  producător
• 
  Ted Haworth

  design de producţie
• 
  Jack Cosgrove

  special effects