Action Comics 670 (Oct 1991) NM- (9.2)

Skullduggery [Armageddon Aftermath]

Script: Roger Stern

Pencils: Bob McLeod

Inks: Denis Rodier

Colors: Glenn Whitmore

Letters: Bill Oakley

Characters: Superman [Clark Kent; Kal-El]; Batman [Bruce Wayne]; Wonder Woman [Diana]; Martian Manhunter [J'onn J'onzz]; Green Lantern [Guy Gardner]; Booster Gold [Michael Jon Carter]; Power Girl; Guardian [Jim Harper]; Deadman [Boston Brand]; Dr. Fate; Professor Emil Hamilton; Lois Lane; Dr. Leung; Allie; Perry White; Sam Foswell; Mr. Ling; Elroy (cat); VILLAINS: Parasite [Rudy Jones]; Atomic Skull [Joe Martin] (first as Atomic Skull); Monarch [Hank Hall]; Lex Luthor (first appearance of Lex's "son"); Gretchen Kelley; Sydney Happersen

Synopsis: Superman and the other heroes clean up Metropolis after Armageddon. Joe Martin's metagene is triggered, turning him into the Atomic Skull.