Story: "The Greatest Hero of Them All" (27 Pages)

Credits:

Paul Levitz (plot, script)
Greg LaRocque (pencils)
Mike DeCarlo (inks)
Mike DeCarlo (ink assists)
John Contanza (letters)
Carl Gafford (colors)
Karen Berger (edits)

Feature Characters: Bouncing Boy
Chameleon Boy
Colossal Boy
Cosmic Boy
Dawnstar
Dream Girl
Duo Damsel
Element Lad
Lightning Lass
Magnetic Kid
Matter-Eater Lad
Mon-El
Phantom Girl
Polar Boy
Quislet
Saturn Girl
Sensor Girl
Shadow Lass
Shrinking Violet
Tellus
Timber Wolf
Ultra Boy
White Witch
Wildfire
Blok
Brainiac 5
Invisible Kid II
Sun Boy (latter four last in Action Comics #591)
Pocket Universe Superboy (last in Action Comics #591; dies in this story; also in flashback preceding issue #37)

Other Characters: Pete Ross (last in Action Comics #591)
Lana Lang (both also in flashback preceding issue #37; both next in Adventures of Superman #444)
Jonathan Kent
Martha Kent (both last in Action Comics #591; all four of the Time Trapper's pocket universe Earth)