Story: "The Power That Failed!" (22 Pages)

Credits:

John Byrne (plot, script, pencils)
John Beatty (inks)
John Costanza (letters)
Petra Scotese (colors)
Michael Carlin (edits)

Feature Character:

Superman (in between Adventures of Superman #441 and #442)

Guest Star:

Supergirl (in between Adventures of Superman #441 and #442)

Supporting Characters:

Lois Lane
Jimmy Olsen (both in between Adventures of Superman #441 and #442)
Sarah Olsen (last in issue #17; next in Adventures of Superman #442)
Cat Grant
Maggie Sawyer (last in Action Comics #600/3; next in Superman Annual Vol. 2 #2/2, page 6)

Villains:

Psi-Phon (J'ankway)
Dreadnaught (Breemmill; first appearance of both; both from behind the scenes in Adventures of Superman #441)
Lex Luthor (last in Action Comics #600/3; next in issue #21)
Gretchen Kelley (last in Action Comics #600/3; next in issue #28)
Professor Killgrave (first appearance; next in Starman Vol. 1 #28)

Other Character:

Chris (first appearance; a police officer)