Story: "Abattoir" (22 Pages)

Credits:

Marv Wolfman (plot, script)
Jim Aparo (pencils)
Mike DeCarlo (inks)
John Costanza (letters)
Adrienne Roy (colors)
Kelley Puckett (associate edits)
Denny O'Neil (edits)

Feature Character:

Batman (last in Robin Vol. 1 #1; next in Batman #458)

Supporting Characters:

Alfred Pennyworth (last in Robin Vol. 1 #1; next in Batman #459)
James Gordon (in between Batman #456 and #458)
Vicki Vale (last in Batman #457)

Villains:

Abattoir (Arnold Etkar/Arnold Etchinson; first appearance; next in issue #628)
Henry Etchinson (first appearance; a candidate for mayor and Abattoir's cousin)
McDonald (a driver) Ellis (first appearance of both; two of Abattoir's helpers)

Other Characters:

Elinore Etchinson (first appearance; Henry Etchinson's wife)
Michael (first appearance; Etchinson's bodyguard)