Story: "Rings of Fire" (22 Pages)

Credits:

Dan Jurgens (plot, script, pencils)
Art Thibert (inks)
Albert DeGuzman (letters)
Glenn Whitmore (colors)
Michael Carlin (edits)

Feature Character:

Superman (last in Superman Vol. 2 #50; next in Action Comics #660)

Guest Stars:

Green Lantern (Hal Jordan)
Green Lantern (Guy Gardner)

Supporting Characters:

Lois Lane
Jimmy Olsen
Perry White (all three last in Superman Vol. 2 #50; all three next in Action Comics #660)
Cat Grant (in between Superman Vol. 2 #50 and #51)

Villains:

Dreadnaught
Psi-Phon (both also in flashbcak in between issue #469 and main story; both next in Superman Vol. 2 #105)
An unnamed alien (first appearance; Psi-Phon and Dreadnaught's master; next in Superman Vol. 2 #105)
Lex Luthor (last in Superman Vol. 2 #50; next in Action Comics #660)

Other Characters:

General Fisk
Torkleson (first appearance of both)
Doctor Peter Tonewaga (first appearance)
Miss Brooks (first appearance; a secretary of Lex Luthor; fired by Luthor and hired by Tonewaga)