The Devil Bat: Opening credits of The Devil Bat - 1940

The Devil Bat: Bela Lugosi as Dr. Paul Carruthers, a mad scientist performing strange experiments.

The Devil Bat: Carruthers doting on his special bat.

The Devil Bat: Carruthers in his lab, exposing his bat to something—radiation?—that causes it to grow.

The Devil Bat: Carruthers observes the effect of his hidious experiment.

The Devil Bat: The Devil Bat, himself. (The first one, at least.)

The Devil Bat: The second part of the plan! Carruthers incorporates a scent that drives the bat to attack into a shaving lotion he's invented.

The Devil Bat: Carruthers teases the bat with a dab of the shaving lotion whose scent drives it to attack.

The Devil Bat: Carruthers' first victim, Roy Heath (John Ellis), innocently accepting the shaving lotion of death.

The Devil Bat: Carruthers angrily contemplates his grudge against Martin Heath, father of his first victim and the employer whom Carruthers believes to have selfishly exploited his genius.

The Devil Bat: Roy Heath (John Ellis) is attacked by the bat.

The Devil Bat: Johnny Layton (Dave O'Brien) is a reporter assigned to cover the mysterious murder story by his editor Joe McGinty (Arthur Q. Bryan).

The Devil Bat: Dave O'Brien as Johnny Layton.

The Devil Bat: The devil bat winging his way through the night.

The Devil Bat: The reporter, Johnny Layton (Dave O'Brien) and photographer 'One-Shot' McGuire (Donald Kerr).