The Devil Bat

Dr. Paul Carruthers is frustrated because he thinks his employers, Mary Heath and Henry Morton, have cheated him out of the company's profits. He decides to get revenge by altering bats to grow twice their normal size and training them to attack when they smell a perfume of his own making. He mixes the perfume into a lotion, which he offers as a gift to Mary and Henry. When they turn up dead, a newspaper reporter decides to investigate.

• 
  Bela Lugosi

  Dr. Paul Carruthers
• 
  Suzanne Kaaren

  Mary Heath
• 
  Dave O'Brien

  Johnny Layton
• 
  Guy Usher

  Henry Morton
• 
  Yolande Donlan

  Maxine
• 
  Donald Kerr

  'One-Shot' McGuire
• 
  Gene O'Donnell

  Don Morton
• 
  Arthur Q. Bryan

  Joe McGinty
• 
  Hal Price

  Chief Wilkins
• 
  John Davidson

  Prof. Percival Garland Raines