|Courteney Cox||Julie Winston|
|James Tolkan||Detective Lubic|
|Christina Pickles||Sorceress of Castle Grayskull|
|Robert Duncan McNeill||Kevin Corrigan|
|Jon Cypher||Duncan (Man-at-Arms)|
When the evil Skeletor finds a mysterious power called the Cosmic Key, he becomes nearly invincible. However, courageous warrior He-Man locates inventor Gwildor, who created the Key and has another version of it. During a battle, one of the Keys is transported to Earth, where it is found by teenagers Julie and Kevin . Now both He-Man and Skeletor's forces arrive on Earth searching for the potent weapon.