The Adventures of Superman (radio) home planet of Krypton is located on the far side of the sun, as opposed to a distant star system as it is in most stories. During the journey to Earth, baby Kal-el grows into an adult and emerges fully grown from his ship after it lands on Earth. He is never adopted by the Kents but immediately begins his superhero career. This was eventually retconned in later episodes to match the narrative of the comic books. This serial introduced the fictional mineral kryptonite, the radiation from which can weaken and even (in some continuities) kill Superman. Aside from giving
Superman (Kingdom Come) several more years' worth of solar energy, effectively erasing his Kryptonite vulnerability. Superman (Kingdom Come) The Superman of "Kingdom Come" (usually referred to as Kingdom Come Superman) is a fictional character, an alternate version of Superman in the DC Comics universe. First introduced in "Kingdom Come" #1 (May 1996), Kingdom Come Superman was created by Mark Waid and Alex Ross. The Superman of "Kingdom Come" first appeared as the main character of the 1996 Elseworlds miniseries "Kingdom Come" written by Mark Waid and Alex Ross with art by Ross, set in the future of the DC Universe. In 1999, "The