Story: "The Tiny Terror of Tinseltown" (22 Pages)

Credits:

John Byrne and Jerry Ordway (plot)
John Byrne (script)
Jerry Ordway (pencils)
Dennis Janke (inks)
Albert De Guzman (letters)
Anthony Tollin (colors)
Michael Carlin (edits)

Feature Character:

Superman (in between Superman Vol. 2 #18 and #19)

Supporting Characters:

Lois Lane (last in Action Comics #600/2; next in Superman Vol. 2 #19)
Jimmy Olsen (last in Action Comics #600/4; next in Superman Vol. 2 #19)
Cat Grant (last in issue #439; next in Superman Vol. 2 #19)
Adam Grant (in between issues #439 and #452)

Villains:

Mr. Mxyzptlk (in between Superman Vol. 2 #11 and #31)
Metallo (last in Superman Vol. 2 #2; next in Doom Patrol Vol. 2 #10)
Psi-Phon
Dreadnaught (both behind the scenes)

Guest Appearance:

Supergirl (next in Superman Vol. 2 #19)

Other Characters:

Ronnie Chin
Milton Fine (both last in issue #438)