Dr. Alex Sartorius

A fixture of DC's darker corners, Dr. Alex Sartorius made his entrance in 1985's Who's Who: The Definitive Directory of the DC Universe, a Bronze Age debut courtesy of Len Wein that planted him firmly in the rogues' gallery of the DC Universe. Over roughly four decades he's haunted the pages of Starman, Detective Comics, and Batgirl, crossing paths with heavy hitters like Batman, Robin, Green Lantern, and Starman himself — elite company that speaks to his enduring relevance. With 32 catalog appearances spanning all the way to 2025, this is a character who has quietly outlasted many flashier contemporaries, and the fact that he shares pages with the enigmatic Doctor Phosphorus makes him a fascinating thread to pull for any reader chasing DC's more shadowy, street-level mysteries. For collectors who love discovering the connective tissue of the DC Universe, Dr. Alex Sartorius is exactly the kind of deep-cut discovery that rewards the curious.