The Joker returns to haunt the Caped Crusaders, this time with a new member added to his gang: Gaggy, who makes The Joker laugh, which then inspires the Clown Prince of Crime with new crime ideas.
Mark Waid, Geoff Johns, John Broome, Gardner Fox, Len Wein, Cary Bates, Bob Kanigher, Marv Wolfman, Francis Manapul, Brian Buccellato, William Messner-Loebs, Scott Kolins, Mike Wieringo, Alberto Dose, Ethan Van Sciver, Carmine Infantino, Ross Andru, Irv Novick, Andy Kubert, Harry Lampert, Everett Hibbard, Mike Collins & George Pérez