Detective Comics #12 2012

Detective Comics #12 (2012) features "The Killer Inside," where Batman battles a radioactive organism threatening to consume him. He confronts Mister Toxic, a clone of Hugh Marder, a deranged scientist who used a particle accelerator to create short-lived clones in his desperate attempt to cure a genetic disease. This issue concludes the intense storyline involving Marder and his toxic creations, offering a resolution to Batman's perilous encounter and the mystery of the Dunhill Facility.