![](https://image.tmdb.org/t/p/w92/g1boVvNLVKYbP2H7MoGol9sQAIH.jpg)
Dr. Paul Carruthers feels bitter at being betrayed by his employers, Heath and Morton, when they became rich as a result of a product he devised. He gains revenge by electrically enlarging bats and sending them out to kill his …
Bela Lugosi,
Suzanne Kaaren,
Dave O'Brien,
Guy Usher,
Yolande Donlan,
Donald Kerr,
Edmund Mortimer
Added on Amazon Prime 2023-03-29.