This issue is a variant of Action Comics (DC, 1938 series) #845 [Direct Sales]. There exist further variants.
Story continued from the previous issue and continues in the next issue. The name Christopher is probably an homage to Christopher Reeve, who starred as Superman in the "Superman II" movie, which much of this story's elements are derived from. The Kryptonese text on the ship on pages 20 and 21 is translated as: "OPEN".