Detective Comics #247 (1957)

THE MAN WHO ENDED BATMAN’S CAREER Criminal scientist Professor Milo succeeds in giving Batman a bat phobia, forcing him to adopt the costume and identity of Starman. Knowing that the thugs would eventually realize that Starman is Batman and they'd use his bat phobia against him, Robin decides to help Bruce get over his fear of bats. For this purpose, Robin uses exposure therapy on Batman and forces him to recall his greatest feats using the Bat-symbol. After the sessions, Batman is cured from his temporal phobia and he learns the location of Professor Milo's laboratory. Batman confronts the mad scientist and delivers him to the authorities. Ironically, once in prison, Milo develops a sudden fear of bats. THE MECHANICAL BLOODHOUND THE IMPOSSIBLE MESSAGES