Story: "Part Two: Siege Mentality" (30 Pages)

Credits: Chuck Dixon and Scott Beatty (plot, script)
Marcos Martin (pencils)
Mark Farmer and Alvaro Lopez (inks)
Willie Schubert (letters)
Tom McCraw (colours)
Digital Chameleon (colour separations)
Matt Idelson (edits)

Feature Character:

Joker (last in Birds of Prey #36; appears in Nightwing #62 between pages of this issue)

Guest Stars: Nightwing II (appears in Nightwing #62 between pages of this issue)
Oracle (appears in Birds of Prey #36 p1-20 between pages of this issue, then on BoP #36 p21)
Black Canary II (appears between pages in Birds of Prey #36), also appears in flashback preceding that issue)
Batman (next in Detective Comics #763)
Blue Beetle II (next in Birds of Prey #36)

Supporting Characters: Shilo Norman
Dina Bell
General Crisp

Villains: Sonar
Copperhead (both in flashback preceding Birds of Prey #36)
Rancor (appears in Nightwing Vol. 2 #62)
Polaris (next in JLA #59)
Mister 104
Carnivora (first appearance)
Killer Frost II (last in Wonder Woman Vol 2. #175)
Orca (last in Batman #581)
King Shark
Black Mass
Slig (next in Orion #19)
Neutron
Chemo
Spellbinder II, Multi-Man (these three last in Birds of Prey #36)

Synopsis

Oracle blames herself and Nightwing for the situation at the Slab, where the Joker has started a full-scale riot and 'Jokerised' most of the prison population. Shilo Norman and Dina Bell are trapped inside, and have to fight their way out through the Aqua-Block, which houses such man-eaters as Orca and King Shark. Meanwhile, the Joker sets the next stage of his plan in motion, priming Black Mass to cause a devastating chain reaction which sucks the prison into a black hole. Batman and Nightwing, newly arrived on the scene, are warned of this plan by the Black Canary, and the three are helped to escape by Blue Beetle.

As the Slab is sucked inside-out, others are less fortunate. Multi-Man, Dina Bell and Shilo Norman are trapped inside and have little idea what is happening.