Original Airdate: ?/?/1983
Adam, Teela, Cringer and Orko visit Tahrin on diplomatic business. A giant earthquake begins to shake the city, and a woman named Celice manages to prevent the destruction by singing. Evil-Lyn and Trap Jaw capture Celice and take her to Snake Mountain. Man-At-Arms and Teela fly to Snake Mountain, but a Giant Crawler under Beast Man's control captures Man-At-Arms. He-Man, Battle Cat, Lizard Man and Orko travel underground to stop Yog. Teela rescues her father, and the two of them head for Castle Grayskull. Evil-Lyn takes control of Celice's mind, and they journey to Castle Grayskull where Celice sings the Sorceress to sleep. He-Man and the heroes arrive to battle the villains who are close to entering the castle. Yog reappears, but He-Man defeats the monster by throwing it into a bottomless abyss.
Synopsis by Zadoc Angell