Original Airdate: ?/?/1983
The Sorceress summons He-Man, Battle Cat and Orko to Castle Grayskull, as it is under attack by an unnatural force. They discover Zanthor is responsible, a criminal banished to the Phantom Zone. Zodac attempts to pass judgment on Zanthor, but He-Man decides that if Zanthor truly does want to make amends, then he will accompany him on his mission. At Snake Mountain the heroes find the vault where the disks should be located, but they only find fake disks. Skeletor appears to them, and they are captured.
Orko and Zanthor escape, Orko finds the controls and frees He-Man and Battle Cat. As they do Trap Jaw, Evil-Lyn and Beast Man appear, but Skeletor accidentally imprisons them. Upon locating the disks Skeletor confronts them with the Snake of Snake Mountain. Zanthor grabs all of the disks, and once again Skeletor attempts to convince Zanthor that he will gain power if he hands them back to him. Zanthor refuses and Skeletor is left with the angry Snake of Snake Mountain. Zanthor is made a cosmic enforcer and joins Zodac.
Synopsis by Zadoc Angell