MARCH: The classic story, “The Rainbow Batman,” was featured in DETECTIVE COMICS #241.
This story was the inspiration for the BATMAN: THE BRAVE AND THE BOLD episode titled, “Emperor Joker!”
Robin inhales “maturing gas,” becomes an adult, and becomes “Owl Man” in BATMAN
#107. And of course, eventually goes back to being Robin.
The history of the Batarang – as well as a detail of Batman’s collection – was found in DETECTIVE COMICS
The Joker and Lex Luthor team up for the very first time in any medium in WORLD’S FINEST COMICS
#88. The Joker drives and Lex rides shotgun, FYI.
After becoming afraid of bats due to the shenanigans of Prof. Milo, Bruce Wayne shuns the Mantle of the Bat and becomes “Starman” in DETECTIVE COMICS