Original Airdate: ?/?/1983
Both Adam and Cringer have a nightmare in which he and Cringer are being pursued by Slime Monsters in Snake Mountain. At Darkdream's lair he demands his allies Tabor and Evil-Lyn make Eternia dark so he can walk the planet again. At the Royal Palace Man-At-Arms, Teela, and Adam ponder over Darkdream's sudden return. Orko's sensitive hearing tells the others of the distant explosions in the Crimson Valley.
Adam and Teela fly there, but during the flight Teela falls asleep, thus Adam as He-Man saves Teela. Darkdream finally escapes and prepares for an attack on Castle Grayskull. Man-At-Arms realizes that the moon is heading on a collision course with Eternia. The Sorceress is captured as Zoar by Darkdream's bats. Darkdream is furious at Tabor, who cannot reverse the collision.
Adam and Man-At-Arms decide that the only thing powerful enough to send the moon back is the highly explosive Nodroxyn. He-Man he picks up a boulder fills it with Nodroxyn and hurls it at the moon where it explodes. The moon's shift allows sunlight to return to Eternia, causing Darkdream and his cohorts to vanish.
Synopsis by Zadoc Angell