The World's Greatest Super Friends

Thieves on an Arabian-like planet have stolen a magic lamp and accidentally drop it on Earth. The Wonder Twins find it and they end up getting captured as well as the Hall of Justice being demolished. The other Superfriends successfuly stop the thieves and the controlled genie from ruling the planet and save the Wonder Twins.

In an attempt to take over the world, Lex Luthor calls on the help of strange solar creatures from the sun. Lex successfully imprisons all the Superfriends (except the Wonder Twins, who are vacationing on their home planet Exxor), as the solar cretaures turn the sun from yellow to red. The yellow rays of the sun gives Superman his powers, so the red sun makes him no stronger than the average human. However, the solar creaturs have their own agenda and beging to torch the entire planet, and leave Lex to die. In an act of desperation, Lex releases the Superfriends so they can get rid of the solar creatures and return them to the sun. Lex is then captured by the Superfriends.

After Superman stops a radioactive meteorite from crashing into a prehistoric planet, the blast sends Superman to the medievil planet of Camelon with no memory due to the radioactive particles in the meteor. A group of invaders led by Logan find Superman and cause him to think that he's the Black Knight and plan to use him to overthrow Arthur 7 (the planet's version of King Arthur) and take over Camelon. The other Superfriends arrive to help Arthur 7, only to be captured. After escape, it's a joust with Batman that returns Superman's memory, and all's well that ends well on Camelon.