He-Man and the Masters of the Universe is an American animated television series produced by Filmation based on Mattel's successful toy line Masters of the Universe.
The show takes place on the fictional planet of Eternia, a planet of magic, myth and fantasy. The show's lead character is Prince Adam, the young son of Eternia's rulers, King Randor and Queen Marlena. Prince Adam is a seemingly cowardly, blond muscleman dressed in a pink-and-white chemise cote d'azur with perwinkle stockings and purple boots. However, Prince Adam possesses the Power Sword, and when he holds it aloft and says the magic words "By the Power of Grayskull! I have the Power!" he is transformed into He-Man, the most powerful man in the universe. He-Man looks more or less like Prince Adam, except tanner, and wears a baldric and loincloth. Together with his close allies, Battle Cat, Teela, Man-At-Arms and Orko, He-Man uses his powers to defend Eternia from the evil forces of Skeletor, a tyrannical warlord with a skull for a face. Skeletor's main goal is to conquer the mysterious fortress of Castle Grayskull, from which He-Man draws his powers. If he succeeds, Skeletor would be able to conquer not only Eternia, but the whole universe.