BATMAN (1940) #517

In pursuit of the serial killer Sleeper, the Dark Knight uncovers her greatest secret–one that may stop cold Batman’s attempts to halt her murderous spree. Bruce Wayne had a dinner party and invited the would-be next target. From him, he learned about scientific experiments on sleep deprivation and how it could be used to create an easy to control zombie. Batman located the killer’s « handler, » who not only created the killer, but controlled her as well. When he arrived, the handler – Remmy – took the killer – Sleeper – out after she attacked him. A government agent arrived and assassinated Remmy (who was also in on the government plot).…