Alfred Pennyworth...attacked at Wayne mansion! Whos hunting those closest to Batman? The monstrous shadow plaguing Gotham City gains the upper hand when two of the Dark Knights most ardent allies fall prey to a violent vendetta! Commissioner Gordon calls in the Dark Knight Detective when theres a murder at the Gotham City Aquarium-staged to look exactly like Thomas and Martha Waynes crime scene, right down to the playbill and pearls. How does this bizarre homicide tie into the shadowy monster that attacks Dr. Leslie Thompkins? This creature looks to wage a war on Batman-and its using Joker Gas to do it! Collects Detective Comics #994-999