He-Man and the Masters of the Universe originated as an action figure collection from Mattel. The line was selling so well, Mattel asked the Filmation company to broaden the toy advertisements into a fully-animated series.
That series had become one of the most popular and recognized cartoon series of the 80s eventually spawning more lines of figures, several more series, three animated films, a live-action film, and a sister series geared towards girls called She Ra: Princess of Power.
He-Man is the alter ego of Prince Adam and also the twin brother of She-Ra. He-Man and his friends defend Eternia and the secrets of Castle Grayskull from the evil forces of Skeletor.
Produced in 1982 by Mattel
Original retail price: $4.99
Trivia Source: imdb.com