Man-At-Arms almost kills the King and Queen when a device accidentally malfunctions, and fearing his skills are weakening with age, considers resigning from his position. Skeletor takes advantage of the situation by installing an energy bug called Byte into the Royal computers to make all the machinery malfunction. Can He-Man find the cause of the problem before it is too late?

A small agricultural village is invaded by Space Pirates. When Adam, Teela, Orko and Cringer investigate the village, the Space Pirates steal Adam's sword, leaving him unable to become He-Man. So Adam must take the leading role in his regular identity and convince the villagers to fight back against the Space Pirates, while Cringer sets out to recover the sword.

Merman attacks a seafaring hermit called Jacob with some mechanical sea monsters, but his attack fails and He-Man, Teela and the Widgets rescue Jacob. Merman thinks he could use the Widgets' Coridite to make his mechanical demons stronger, so he sets up a scheme to steal the Coridite. He-Man and his friends must stop Merman, with the help of Jacob.

A fierce storm, raging around Snake Mountain, uncovers a secret passage beneath the ancient fortress. Skeletor, Evil-Lyn and Beast Man investigate, and they find a mystic-looking glass called the Mirror of Moruvad, which has the power to create a double of anyone which is the opposite of what they are. Skeletor decides to capture someone close to He-Man, and make an evil double of them that will steal the secrets of Grayskull for him.

He captures Koldar, a heroic ally of He-Man's, who has just arrived at the palace for a welcoming ceremony. He uses the Mirror to create an evil double of Koldar, which he sends to the Palace, to trick He-Man into letting him enter Castle Grayskull!

But Koldar lures Skeletor in front of the mirror... and a heroic Skeletor is created, which goes to help foil Skeletor's plan!

An evil dragon called Morning Star hopes to resurrect the age-old war between the dragons and humans on Eternia. He extinguishes the Dragon fire, that powers Granamyr's kingdom, and blames it on the humans. War is declared between the humans and dragons, and He-Man is sent on a mission to recover the dragon fire and put and end to the war.

Skeletor and Evil-Lyn send a disguised Kobra Khan to Palace Eternia to disrupt the Eternia Day Celebration. But knowing Orko's magic will see through Khan's disguise, Evil-Lyn uses her magic to erase Orko's entirely. He-Man and Orko set out to recover Orko's missing magic, but the only way they can do it is by finding the Magic Falls- can they reach them in time?

A boy called Tharen is jealous of his girlfriend Careel's admiration for He-Man, so he tricks her into thinking he is He-Man's secret identity in the hope that she'll like him better.

Meanwhile, at Eternos jail, a criminal scientist caled Galen Nycroft has managed to teleport to his cell a strange machine to increase his power. The machine transforms him into Modulok, and he escapes from jail and sets out to capture He-Man, in the hope of convincing Skeletor to recruit him. He overhears Tharen telling Careel that he is He-Man, and captures him, thinking he is He-Man's alter ego! Can the real He-Man rescue Tharen... and will his real secret identity be threatened in the process?

An alien race called the Vendari, which knows no evil, visits Eternia, wishing to see the difference between good and evil for themselves, and which side is stronger. They select Fisto from the side of good and Spikor from the side of evil, to compete against one another in a series of games. However, Fisto's chances of victory are threatened by Skeletor and his crew, who refuse to play fair and do all they can to ensure Spikor emerges victorious.

Kobra Khan visits the heroic warriors, offering a truce in exchange for their help. He tells them that his people, the Reptons (a snake clan to whom he belonged before he joined Skeletor's forces) are in need of help- someone has extinguished the furnace which heats their underground kingdom, plunging the whole kingdom into severe coldness. Khan wants them to find the culprit and re-heat the furnace. He-Man, Man-At-Arms, Battle Cat and Orko go to the Reptons kingdom with Khan, but it soon transpires that Khan is not to be trusted... for it was he who extinguished the furnace himself, and he intends to frame He-Man for the crime and expose them, in the hope of gaining the Repton King's crown in return!