He-Man and the Masters of the Universe a "life lesson" or "moral of the story" at the end of each episode. This moral was usually directly tied to the action or central theme of that episode. The show was so successful that it spawned a spin-off series, "", following the adventures of He-Man's sister, Princess Adora. Mattel's subsequent attempts to relaunch the He-Man toy line also led to the short-lived sequel series "The New Adventures of He-Man" in the early 1990s, and an update of the series for a contemporary audience in 2002. It is also noted for featuring early script-writing work from J. Michael Straczynski, later
He-Man and the Masters of the Universe powers to defend Eternia from the evil forces of Skeletor. Skeletor's main goal is to conquer the mysterious fortress of Castle Grayskull, from which He-Man draws his powers. If successful, Skeletor would have enough power to rule all of Eternia and possibly the entire universe. The Mattel company released the original He-Man action figure in 1982; the franchise backstory was developed by the Filmation animation studio. On 1 December 1982, Michael Halperin wrote a "series bible". Some time after, both firms pitched the idea to the ABC network, who turned it down. The resulting series, "He-Man and the Masters of