Adventures of Superman

Superman rams a giant asteroid on a collision course with Earth. The impact causes the asteroid to now orbit the planet. However, Superman is staggered as he returns to Earth. He manages to change back to Clark Kent (apparently a reflex action) but doesn't remember who he is. Meanwhile, the orbiting asteroid still presents hazards for Earth. Only Superman can place an explosive device that will demolish the asteroid -- and no one, including Clark, knows where Superman is.

Jor-El, Krypton's leading scientist, sends his infant son to Earth in a rocket just as the planet explodes. The rocket is found by Eben and Sarah Kent and Eben gets the infant out before the craft explodes. They raise the child as their own. Years later, after Eben's death and now aware of his super powers, Clark Kent moves to Metropolis. Sarah has made a costume for him, and she tells him that he must use his powers for good. Superman makes his debut saving a man falling from a blimp. As Clark, he hustles the man to the Daily Planet, which scores a scoop. This convinces editor Perry White to hire Clark.

A criminal breaks into Clark Kent's apartment, finds a hidden closet and steals Clark's Superman costume. The criminal is fatally wounded but not before he takes the costume to hood Ace and his girlfriend Connie. Clark is desperate to find the missing costume.