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Detective Comics #837
A special issue featuring two of Gotham's recently reformed rogues: Harley Quinn and the Riddler! When a rogue Wayne Enterprise employee steals metahuman serum, it's up to Harley and the Riddler to crack the case!
Characters: Batman, Catman (DC Comics), Deadshot, Desaad, Granny Goodness, Harley Quinn, Holly Robinson, Huntress (Bertinelli), Knockout, Ragdoll, Riddler, Scandal Savage, Tim Drake
Creative roster
Don Kramer (Penciller)
Jeanine Schaefer (Associate Editor)
John Kalisz (Colorist)
Mike Marts (Editor)
Paul Dini (Writer)
Simone Bianchi (Cover)
Steve Wands (Letterer)
Wayne Faucher (Inker)
Story DNA — may contain spoilers
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