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
All-Star Superman (film) stealing the super serum. All seems lost until Superman's pet Sun-Eater sacrifices itself to weaken the tyrant star, which allows Superman to destroy Solaris. Clark returns to the "Daily Planet", very ill, and collapses upon completing his article, "SUPERMAN DEAD". When the staff tries to save him they realize that he has stopped breathing and his heart has stopped. But before they can do anything to help Clark, the super-powered Lex Luthor arrives and attempts to kill Lois. Clark revives and fires a gravity gun at Luthor. Superman tells Luthor that he has been on to him ever since Superman