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Dr. 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 employers' family members by instilling in the bats a hatred for a particular perfume he has discovered, which he gets his victims to apply before going outdoors. Johnny Layton, a reporter, finally figures out Carruthers is the killer and, after putting the perfume on himself, douses it on Carruthers in the hopes it will get him to give himself away. One of the two is attacked as the giant bat makes one of its screaming, swooping power dives.

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

Genres: Crime, Horror, Mystery

Starring: Bela Lugosi, Suzanne Kaaren, Dave O'Brien

Released: December 13, 1940

Runtime: 68.0

Popularity Rating: 0.720

Producers Releasing Corporation (PRC)

United States of America

Dr. Paul Carruthers Bela Lugosi
Mary Heath Suzanne Kaaren
Johnny Layton Dave O'Brien
Henry Morton Guy Usher
Maxine Yolande Donlan
'One-Shot' McGuire Donald Kerr
Martin Heath Edmund Mortimer
Don Morton Gene O'Donnell
Tommy Heath Alan Baldwin
Roy Heath John Ellis
Joe McGinty Arthur Q. Bryan
Chief Wilkins Hal Price
Prof. Percival Garland Raines John Davidson
Coroner (scenes deleted) Billy Griffith
Walter King Wally Rairden

Art — Art Direction: Paul Palmentola
Camera — Director of Photography: Arthur Martinelli
Directing — Director: Jean Yarbrough
Editing — Editor: Holbrook N. Todd
Production — Associate Producer: Guy V. Thayer Jr.
Production — Producer: Jack Gallagher
Production — Production Manager: Melville De Lay
Writing — Original Story: George Bricker
Writing — Screenplay: John T. Neville