He-Man and the Masters of the Universe 1x12

Disappearing Act

After He-Man puts an end to their latest plot, Skeletor and Beast Man plan to get rid of him once and for all; with use of invisible helmets they sneak into the Royal Palace and kidnap Prince Adam, to use as bait to lure He-Man out into a trap. Unfortunately, one of Orko’s magic spells has gone wrong, teleporting the Sword Of Power away into Eternia’s distant past, leaving Adam unable to transform into He-Man. While the Sorceress sends Orko and Cringer back in time to try and retrieve the sword, she has a special assignment for Man-At-Arms to trick Skeletor into believing that He-Man is about when he is not…