He-Man and the Masters of the Universe - Season 2 - Eps 46: Double Trouble
A fierce storm, raging around Snake Mountain, uncovers a secret passage beneath the ancient fortress. Skeletor, Evil-Lyn and Beast Man investigate, and they find a mystic-looking glass called the Mirror of Moruvad, which has the power to create a double of anyone which is the opposite of what they are. Skeletor decides to capture someone close to He-Man, and make an evil double of them that will steal the secrets of Grayskull for him. He captures Koldar, a heroic ally of He-Man's, who has just arrived at the palace for a welcoming ceremony. He uses the Mirror to create an evil double of Koldar, which he sends to the Palace, to trick He-Man into letting him enter Castle Grayskull! But Koldar lures Skeletor in front of the mirror... and a heroic Skeletor is created, which goes to help foil Skeletor's plan!
About He-Man and the Masters of the Universe

Title: He-Man and the Masters of the Universe
First Air Date: 1983-09-05
Last Air Date: 1984-12-08
Status: Ended
Rating: 7.293/10 (from 374 votes)
Language: EN
Seasons: 3
Total Episodes: 130
Network: Syndication
Genres: Action & Adventure, Animation, Sci-Fi & Fantasy, Kids
Production Companies: Mattel, Filmation Associates
Synopsis
When Adam, Prince of the planet Eternia, raises his magic sword he transforms into He-Man (the most powerful man in the universe). With his allies and friends, he battles the evil Skeletor and his minions to protect the secrets of Castle Greyskull.
Cast

John Erwin
He-Man / Prince Adam / Ram Man / Beast Man / Whiplash / Webstor / Faker / Granamyr (voice)

Alan Oppenheimer
Skeletor / Battle Cat / Cringer / Man-at-Arms / Mer-Man / Buzz-Off (voice)

Linda Gary
Teela / Evil-Lyn / Queen Marlena / Sorceress of Castle Greyskull (voice)

Lou Scheimer
Orko / King Randor / Stratos / Mekaneck / Man-E-Faces (voice)

Erika Scheimer
Arcadian women (voice)