Batman #63 (1951)

In Batman #63 (1951), we get to witness the Caped Crusader going up against one of his most iconic villains - The Joker. This issue features "The Joker's Crime Costumes!", where The Joker becomes inspired by Batman's exhibits of different suits, making special ones of his own and beginning a crime spree dressed as comedians. Meanwhile, in "The Case of the Flying Saucers", Batman and Robin investigate a strange man with two hearts and odd objects in his pockets, leading them to a hidden base with a flying saucer. Our heroes are captured, and Batman is held hostage while Robin races to get government representatives to hear the Saturnian's demands to prevent invasion. This issue also has the origin story of Killer Moth - a prisoner who becomes obsessed with Batman and creates a new persona to rival him - complete with a Mothmobile, a trophy room, and a crime lab devoted to finding ways to make crimes unsolvable. Overall, this issue is packed with classic Batman stories that will keep you on the edge of your seat.