Story: "The Other Half" (22 Pages)

Credits:

Sean McKeever (plot, script)
Carlos Rodriguez (pencils)
Bit and Rebecca Buchman and Jimmy Palmiotti (inks)
Travis Lanham (letters)
Rod Reis (colors)
Adam Schlagman (assistant edits)
Dan Didio (edits)

Feature Characters:

Robin III (also in flashback in between issue #55 and #56 and in flashback in between #56 and #57)
Miss Martian (also in flashback in between issue #55 and #56 and in flashback in between #56 and main story)
Kid Devil

Villains:

Clock King II (also in flashback in between issue #55 and #56)
Disruptor II (also in flashback preceding in issue #56)
Copperhead II
Dreadbolt
Persuader II (as the Terror Titans)
Martian Manhunter II (last in issue #55)

Other Characters:

Miss Martian's parents (first appearance; die in flashback)

Comment: This story takes place prior to and during the events of issues #56 and #57.