Story: "Trial Run" (22 Pages)

Credits:

Roger Stern (plot, script)
June Brigman (pencils)
Jackson Guice (inks)
Albert De Guzman (letters)
Glenn Whitmore (colors)
Mike Carlin (edits)

Feature Character:

Supergirl (last in flashback in New Titans Annual #11; also in flashback preceding flashback in Adventures of Superman #444)

Supporting Characters:

Martha Kent
Jonathan Kent (both last in Superman: The Man of Steel #29; both next in issue #4)

Villains:

Lex Luthor II (in between Superman: The Man of Steel #29 and #30)
Sydney Happersen (last in Superman: The Man of Steel #29; next in Adventures of Superman #509; both next in Action Comics #698)
Gretchen Kelley (last in Supergirl and Team Luthor #1; next in Action Comics #697)

Other Characters:

Lex Luthor's Supergirl Clones (first appearance of all)