Superman [Clark Kent; Kal-El]; General Sam Lane; Jimmy Olsen; Lois Lane; Mrs. Ramsay (flashback); Steel [John Henry Irons]; Dr. Abernathy (villain); Lex Luthor (villain); Kryptonite Man [Clay Ramsay] (origin, villain)
Synopsis
Superman gets help from Steel when he battles the Kryptonite Man for the first time. The Kryptonite Man was created by Lex Luthor, of course.