Issue: #230
Last valuation update: 2025-11-21
Cover by Curt Swan and Murphy Anderson."Killer Kent versus Super Luthor" written by Cary Bates, penciled by Curt Swan and inked by Dan Adkins.
First appearances: Dr. Markem, Lex-El, Mr. Dallinger
Creators: Dan Adkins, Cary Bates, Curt Swan, Murphy Anderson, Mort Weisinger, E. Nelson Bridwell
Characters: Superman, Lois Lane, Lex Luthor, Jonathan Kent, Martha Kent, Dr. Markem, Lex-El, Lana Lang, Mr. Dallinger, Jor-El, Lara Lor-Van