The Devil Bat

He's Trained His Brood of Blood-Hungry Bats to Kill on Command!

A pulpy 1940s horror-thriller about a vengeful mad scientist weaponizing giant bats, blending B-movie creature horror with detective procedural.

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.