• 
  Jack Arnold

  regizor

• 
  Richard Matheson

  scenarist

• 
  Grant Williams

  Scott Carey
• 
  April Kent

  Clarice
• 
  Paul Langton

  Charles Carey
• 
  Raymond Andrew Bailey

  Dr. Thomas Silver
• 
  Randy Stuart

  Louise Carey
• 
  Orangey

  Butch the Cat

• 
  Diana Darrin

  Nurse
• 
  Lock Martin

  Giant
• 
  William Schallert

  Doctor Arthur Bramson
• 
  Raymond Bailey

  Doctor Thomas Silver
• 
  Billy Curtis

  Midget
• 
  Helene Marshall

  Nurse
• 
  Frank J. Scannell

  Barker (as Frank Scannell)

• 
  Richard Matheson

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