The World's Greatest Superfriends is an American animated television series about a team of superheroes which ran from September 22, 1979, to September 27, 1980, on ABC. It was produced by Hanna-Barbera Productions and is based on the Justice League and associated comic book characters published by DC Comics.
This iteration of the Superfriends program contained full half-hour episodes which were among the darkest of the superheroes' careers. It featured only Superman, Wonder Woman, Batman, Robin, Aquaman, and the Wonder Twins. Their adventures took them into underground kingdoms of dwarves, mushroom worlds populated by tar creatures, transformed them into vampire bats, pitted them against the Super enemies of an alternate dimension's Hall of Evil, and even a planet Mr. Myxyzptlk has based on L. Frank Baum's land of Oz.