Detective Comics #418

In "…And Be a Villain!", the Creeper struggles to reclaim his identity as Jack Ryder, trapped in his monstrous form by Dr. Yatz’s serum, while Yatz’s son Ishmael manipulates him into criminal acts with the promise of a cure. As Gotham’s premiere of the film The Stepfather—a dramatization of the infamous 1920s gangster Floyd Marcus—unfolds, Marcus is assassinated in the theater, and Barbara Gordon, recognizing the killer as his stepson Mike, dons the Batgirl mantle to investigate. Written by Denny O'Neil and illustrated by Irv Novick with inks by Dick Giordano and letters by John Costanza, this 1971 tale blends psychological tension with a noir-inspired murder mystery, all under Neal Adams’ striking cover art.