Detective Comics #282

Deep in a subterranean cavern, Batman stands poised with a blazing torch as a massive, snarling green serpent — identified by a speech bubble as a "Krajan Cave-Eel" — lunges toward the small boat carrying him, Robin, and what appears to be an extraterrestrial visitor in a yellow suit. Sheldon Moldoff's cover for this August 1960 issue of Detective Comics crackles with tension, framing the adventure promised by the title "Batman's Interplanetary Rival!" in wonderfully pulpy style. It's a snapshot of Silver Age DC storytelling at its most imaginative — cosmic guests, underground monsters, and the Dynamic Duo right in the thick of it.