While helping save an alien ship from being drawn into a black hole, Superman is drawn in with the Supermobile. He goes back through time to Krypton. Superman decides to save Krypton, by stopping the sun from expanding. He then goes through the black hole and back to Earth. On Earth, he finds a new timeline. The Legion of Doom has defeated the Super Friends, since Superman no longer existed. Superman must return to the past and let Krypton be destroyed.

Very cool episode of the Superfriends from the rare 1983 shorts. I wonder if Alan Moore had seen this episode prior to writing the Superman Annual #11 in 1985. The stories are similar, but Moore’s is definitely the better of the two. His annual would later server as the inspiration for the Justice League Unlimited episode from 2004.