• 
  Spencer Gordon Bennet

  regizor
• 
  Wallace Grissell

  regizor

• 
  I. Stanford Jolley

  Zarol [Chs. 8-9]
• 
  Fred Kelsey

  Lab Guard [Ch. 1]
• 
  Frank Marlowe

  Henchman [Chs. 13-14]
• 
  Selmer Jackson

  J. R. Wade, Deputy Commissioner of Public Safety [Chs.11-13]
• 
  Frank Hagney

  Henchman [Ch. 14]
• 
  Tommy Farrell

  Atoma Head Soldier [Ch. 2]

• 
  Daniele Amfitheatrof

  music department
• 
  Sam Katzman

  producător
• 
  Herbert B. Leonard

  production manager