When Beast Man crashlands by Palace Eternia in one of Skeletor's shuttles, Adam, Teela, Man-At-Arms, Man-E-Faces and Ram Man discover that he was being sent to the Dark Moon of Eternia. Curious as to why Skeletor wanted to send him there, they imprison Beast Man in jail and take the ship up there themselves. Reaching Eternia's Bright Moon, they discover that Eternia's two moons are at war with one another after a resident of the Dark Moon reported seeing the people of the Bright Moon causing severe destruction on the Dark Moon. Knowing that the residents of the Bright Moon are innocent, the heroic warriors realise that Skeletor must be the real cause of the destruction, and so Man-E-Faces disguises himself with a Beast Man costume, and goes to the Dark Moon to spy on Skeletor and his warriors and foil their scheme.
An ancient temple is found within Mount Eternia, and when investigating it, Orko accidentally unleashes The Energy Beast, a powerful electrical demon that once ruled Eternia. He-Man, Man-At-Arms and Teela must drill into the mountain to find the Gold Chamber, which contains the magic needed to control the Energy Beast, before it is too late. But they also face trouble from Skeletor, who is hoping to strike a deal with the Energy Beast himself.
Fisto tells a young boy the story of how he was once a bad guy, terrorizing the forest.
A chess-playing nobleman called Lord Todd, from a far-off land, visits Palace Eternia and instantly charms and astounds the Royal Family with the wonderful gifts he provides them, and his incredible skill at chess. To repay King Randor for allowing him to visit, he offers to take Teela on a tour of his own home- the far-off Castle Star. The two of them depart together. However, things turn disturbing when Man-At-Arms is called to Grayskull by The Sorceress, who tells him that a great evil has arrived on Eternia from another dimension... and it has taken its base nowhere other than Castle Star.....
When Orko messes up several attempts to help his friends prepare for the King and Queen's wedding anniversary, he decides he is useless and runs away from the palace with Cringer. He-Man, Teela and Man-At-Arms begin to search for him, to get him back and convince him that they love him as he is.
Whiplash arrives at the Royal Palace, badly wounded, and asking for help. Skeletor has tried to summon up Sh'Gora, a dreaded creature from another dimension, only to have the being turn on him and imprison him along with Evil Lyn and Trap Jaw. Reluctantly, He-Man and his allies must rescue Skeletor and join forces to stop Sh'Gora taking over Eternia and the powers of Castle Grayskull...
A prehistoric race of Bee People know as the Tychons come back to life, and threaten to steal the food supply of Buzz-Off and his hive. And when Skeletor gets involved, the stakes are raised.
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?
Prince Adam and Melaktha undertake an archaeological expedition of the Temple of the Cats, once occupied by an apparently extinct race of Cat People. They take from the temple an ancient statue, called the Grymalkin. But unknown to them, the Cat People still exist and dwell deep within the temple- and the Grymalkin contains an evil demon imprisoned inside. The Cat People's king sends an agile Catwoman, Kittrina, to recover the statue from the Royal Palace. But at the same time, Skeletor sends his minion Webstor after the statue, and beating Kittrina to it, Webstor takes the statue back to his master, who subsequently frees the demon.....
Dree Elle comes to Eternia to enlist Orko's help, explaining that an ambitious Trollan wizard called Snoob has defeated Uncle Montork and taken his position as head of the Academy of Magic. Since Montork claims to have felt inexplicably weak when fighting Snoob, they suspect unfair play was used. Orko and Dree Elle go to Trolla, followed by He-Man and Battle Cat, and it soon transpires that Snoob is being controlled by Whiplash, who is trying to learn magic in order to impress Skeletor. It is up to He-Man to stop his scheme, with the help of his Trollan friends!
Orko is searching all over the Royal Palace for a book he has bought Prince Adam for his birthday. It soon transpires that not only this book is missing, but every book in the kingdom! The books have been stolen by a villain called Batros, who has hidden them in the Temple of the Sun. As the heroes set out to recover the books, Skeletor sends Beast Man and Trap Jaw out to recruit Batros into his army.
At long last, the origin of the Sorceress is revealed, as a powerful wizard from Eternia's past threatens to return.
An attack on Avion by Skeletor causes serious damage when the kingdom's defence shield is sabotaged. A female citizen named Hawk has framed Stratos for the crime, so she can have him exiled from Avion. Once he has been banished, Hawk helps Skeletor steal the Egg of Avion, which provides the Birdpeople with the power of flight... but instead of giving her riches as he promised, he imprisons her in the Demon Zone, the home of Whiplash! Stratos teams up with He-Man, and they are faced with the three tasks of recovering the Egg, releasing Hawk, and proving Stratos' innocence!
An irresponsible junior guard called Philip fails to notice Whiplash sneaking into the palace grounds to steal the King's Ice Raider. He-Man stops Whiplash just in time, but King Randor relocates Philip to the Eternian Weather Station to improve his responsibilities. Skeletor, determined to get hold of the Ice Raider, consults his agent in the North, Icer, and orders him to take over the Weather Station. Icer has no trouble in taking over, and before long weather disasters are occurring all over Eternia.
Man-At-Arms has managed to make contact with a peaceful alien being called Om, hovering above Eternia. When Om is being welcomed by the people of Eternos, Skeletor invades the city with General Tataran and the Goblin Army. A fierce battle follows, and Om is confused by the way the two sides fight against one another, as his race knows no violence. So to see which side is wiser and stronger, Om selects He-Man from the side of good, and Skeletor from the side of evil, and pits them against one another in a fight to the finish.
He-Man is summoned to Darksmoke by Granamyr, who tells him that dragons have been mysteriously disappearing from Dragon Mountain, and he wants He-Man to investigate. He-Man calls upon his most trusted spies, Mekaneck and Buzz-Off, to investigate the mystery, and they spot Kobra Khan and Webstor using a strange machine to transport the dragons to another dimension. A spell by Orko accidentally transports all of them- both heroes and villains- to the alien world, and the heroes discover that the dragons are being used to fight for amusement by three gamers on this world. It is up to the heroes to put a stop to the games and free the dragons from cruelty.
Man-At-Arms has built a new dam around the kingdom of Eternos, to block off the Eternian ocean and prevent flooding. However, some of his food ships have gone missing, and while flying over the ocean to investigate, Buzz-Off has noticed a strange volcanic island which is not marked on any map. Adam, Cringer, Orko, Man-At-Arms, Teela and Buzz-Off go to investigate further. It soon turns out that Skeletor is the source of the problem, using a floating island to capture the food ships, planning to starve the Eternians then smash through the dam to flood Randor's kingdom! Can the heroes stop him before he succeeds?
As Prince Adam and Teela attempt to fix a broken-down Attak Trak in the desert, Orko stumbles upon the wizard Kothos, who was transformed into a sand slug by Evil-Lyn in the earlier episode "The Witch and the Warrior". He turns him back to his true form, but has made a mistake as Kothos captures the heroes and offers them to Skeletor in return for his second-in-command, Evil-Lyn, upon whom Kothos is determined to enact revenge.
Squinch the Widget visits Snake Mountain, hoping that Skeletor may be able to help him become bigger and stronger. Evil-Lyn gives him a gift for He-Man, and tells him she will make him big if he delivers it to He-Man. But of course, when he delivers it it turns out to be a trick- the box contains soporific mist which makes He-Man and Battle Cat fall asleep, thus enabling Skeletor to capture them! Realising he has been tricked, Squinch vows to make up for his mistake. But with his small size, is he big or strong enough to rescue Eternia's hero himself?
Teela and Orko are returning from admiring one of the Eternian farmer's bumper crops, when strong tremors suddenly shake the ground and whole crops disappear. Teela is sucked underground with one of the tremors, where she finds herself in the tunnels of an underground community called the Belats. While Orko raises the alarm, the Belat's King, Subternias, who is determined to feed his people no matter what, holds Teela prisoner, and she finds that the Belats are not evil, but are very mistrusting, after being tricked by Skeletor years before...
Prince Adam finds his work as He-Man is tiring him out, and Teela is getting frustrated with Adam's apparent laziness, unaware of the real reason for it. After a heated argument between the two of them, Teela decides to make up for it by making Adam train in a fun way, by following her across an obstacle course with a tracking device. Teela runs way ahead of Adam, but runs headfirst into danger as she slips over the edge of Castle Grayskull's abyss and falls down into its bottomless depths. When they realise the possibly fatal situation Teela is in, Adam (as He-Man), Man-At-Arms and The Sorceress must do their best to rescue her before it's too late.
Skeletor devises a cunning scheme to capture Queen Marlena and lead He-Man to his robot bird Screeech, and he sends Whiplash, Merman, Clawful and Kobra Khan to carry it out. Kobra Khan kidnaps Marlena after overpowering the Royal Family with his sleep gas, then he and Merman take her through the Haunted Forest back to Snake Mountain. Whiplash and Clawful, meanwhile, create visible tracks in the ground in the opposite direction. When the Royal Family awake, He-Man, Man-At-Arms and Teela follow Whiplash and Clawful's false trail, which will only lead them to Screech. But Cringer's sense of smell detects that Marlena was taken towards the Haunted Forest, and so he and Orko set out to follow the correct trail. Encountering many dangers along the way, this is Cringer's big chance to prove he's no Fraidy Cat!
Skeletor captures King Randor, Prince Adam, Teela, Man-At-Arms and Orko, intending to attack the Palace and take over Eternos City. Since Adam is unable to become He-Man when in Skeletor's clutches, only one person is able to save them... Queen Marlena, as pilot of the Rainbow Explorer, the ship which brought her from Earth to Eternia. Using her amazing pilot skills she leads a fleet towards Snake Mountain to rescue Skeletor's captives.
King Randor sends Adam, Cringer and Orko to the Ice Kingdom of Morainia, to collect a powerful energy crystal from his friend King Moraius. However, Skeletor wants the crystal for himself and follows them, capturing King Moraius and demanding that the Royals give him the crystal in return for their King. As He-Man, Adam teams up with the King's daughter, Princess Janis, who helps devise a scheme to rescue her father.
A runaway Prince called Glitch from the planet Celasia has joined Skeletor's crew at Snake Mountain, but is so weak and pitiful that he is thrown out violently by Skeletor. The Royal Family take him to the palace to look after him, but Glitch is totally consumed by fear after his ordeal at Snake Mountain. When Glitch's father turns up on Eternia to look for him, and Skeletor attempts to recapture him, He-Man helps Glitch to face his fears.
Man-At-Arms needs a sample of Rainbow Quartz to repair a frequency transmitter. But the only place where they can find Rainbow Quartz is in a cavern in Snake Mountain! Adam and Cringer have no choice but to venture into Skeletor's domain to find the Quartz- and at the same time, Teela and three students she was training, who have taken a dare, also end up in Skeletor's clutches! With all this unwanted company suddenly invading Snake Mountain, ultimate chaos is sure to ensue!
When Orko finds out that Adam's visiting cousin, Prince Dal, doesn't think Eternos is as magical as his own home kingdom, he gives Prince Dal a pretty rock and tells him that its called the Star Crystal and that it will protect anyone who has it. Prince Dal believes the lie and steals the rock from Orko later to bring to his father, who is fighting a war against the Torks, thinking it will make him invincible.
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.
The Sunstone, which is held within the Temple of the Sun, is running out of power and must be recharged, in The Ceremony of the Sun, which takes place once a century. The Sunstone's keepers invite He-Man and his companions to the ceremony, but on the way they face trouble from Negator, who wants the Sunstone's power for himself, and even more inconveniently a Trollan called Prankster who is deliberately making a nuisance of himself and will only go home if they can guess his name.
Prince Adam, Man-At-Arms and Orko are searching the Vine Jungle for the legendary Stone City- but unbeknown to them, they are being followed by Evil-Lyn, Webstor and Kobra Khan, who are after the city's treasures. By stealing a map, the villains beat the heroes to Stone City, which is filled with realistic-looking statues. When teleporting a life-bringer machine to Snake Mountain, Evil-Lyn accidentally revives the city's warrior king, Vokan! Vokan reveals that his people have been sleeping in stone for thousands of years, to be awakened when Eternia next needs their help. When he notices the life bringer is missing, Evil-Lyn tells him that it is located in Castle Grayskull. Before long, Vokan himself is attacking Grayskull, unwittingly being used by Evil-Lyn, who wants to gain the castle's powers!
He-Man and company race to recover the Ancient's Book of Spells from it's long-lost hiding place. Skeletor learns of its existance and seeks to take it for himself.
Man-At-Arms tells Orko the origin of Battle Cat, from how Adam discovered Cringer in the forest as a child, to how Cringer acquired the powers of Grayskull and became Battle Cat.
When investigating an ancient temple with Prince Adam, Orko accidentally brings the barbaric King Tamask from Ancient Eternia to the present, with a magical Time Wheel. When he comes across the Royal Palace, Tamask is confused by how it has changed and believes Randor is a magician who has taken over his kingdom. Angrily, he attempts to fight to reclaim the kingdom he thinks has been stolen from him. He-Man must help Tamask see the light, as well as convincing him to turn from his violent ways.
Man-at-Arms stumbles upon a royal trinket that could belong to King Miro, King Randor's long-lost father. With the help of He-Man and Man-at-Arms, Randor journeys to the Swamps of Enchantment in search of his father.
Prince Adam and Cringer crashland in the Misty Swamps when their Wind Raider is attacked by Skeletor's crew. Adam transforms to He-Man and manages to stop them sinking, but he feels weak, poisoned by the swamp water. A boy called Drak and his grandfather find He-Man, and the grandfather decides to transport him along to their village where he can be cured. But Drak, who is tempted by power and wealth, wants to turn He-Man in to Skeletor to gain riches in reward. As they journey to the village, they are pursued by Trap Jaw and Whiplash- will Drak betray He-Man and give him over to the bad guys, or will he see the light and help fend off Skeletor and his minions?
The circus is coming to the kingdom, much to the excitement of Orko, who wants to become a circus performer. Skeletor, enraged that the circus wouldn't come and perform for him at Snake Mountain, sends Evil-Lyn and Beast Man to cause enough ruin to see that it never opens, so that he can take it over himself and be entertained by it whenever he likes...
He-Man meets a blind boy called Lous, whose friends consider him to be helpless just because he is blind. To give him a chance to prove himself, He-Man offers to take Lous on an adventure with himself and Ram Man, to the caves of the Singing Crystal. Lous accompanies them to the caves, but once inside, a flash of light blinds both He-Man and Ram Man. With all three of them blind, Lous uses his senses and bravery to lead them back to safety, across many dangerous obstacles.
Orko runs away, thinking his friends don't really like him. The Sorceress solves his problem, but on his way back to the palace he is captured by Skeletor, who puts him under a spell to reveal the riddle of the jaw bridge. Skeletor uses this riddle to break into Grayskull, and The Sorceress must defend the castle while He-Man tries to free Orko.
As the heroes visit the planet Phantos, Evil-Lyn kidnaps Teela, Man-At-Arms and Orko, and takes them to Snake Mountain, where she shrinks them using a Reducto-Ray. He-Man goes to rescue them, but finds them placed in a trap which will either shrink him or kill them if he uses mere brawn to save them. So he realises he must use his brain to solve the problem- and since Teela has been complaining that Adam is lacking in brain power, he decides to do the job as Adam.
Orko wants to impress Dree Elle with a special birthday present, so he goes to Rose Mountain in search of the legendary Bitter Rose, which was formed by the tears of a grieving goddess. However, when he picks the rose it causes an avalanche, which almost destroys the village of the Kex below- and also draws the attention of Skeletor, who sends Beast Man and Trap Jaw to steal the rose for him.
The Royal Family are holding a celebration with the Widgets, celebrating the completion of Man-At-Arms' new machine- the Coridite Reactor, which will generate electricity for all Eternians. Smudge, a Widget who has been given the job of guarding the reactor, becomes addicted to gambling with a showman called Melbrag at the ceremony. Melbrag tricks Smudge into gambling away some Coridite, and he flees with the sample, intending to sell it to Skeletor. When He-Man pursues Melbrag, he only tempts him even further, as Melbrag plans to capture He-Man, and deliver him to Skeletor for an even bigger payment!
Skeletor uses a teleportation device to teleport The Sorceress, in the form of Zoar, to another planet. As He-Man and Battle Cat go to this planet to rescue The Sorceress, Teela is given the task of guarding Grayskull in The Sorceress' place. Unaware that someday she will inherit the position of Sorceress for good, will she be able to live up to her destiny?
Orko is visited by his old friend (yes, <I>old</I> friend, in spite of the title) Squunge, from the Academy of Magic on Trolla. Squunge has a knack for telling wild lies and tall tales, and quickly begins to annoy Orko and his friends with this habit. Then Orko winds up being captured by an intergalactic criminal called the Slave Master, scouring the universe for powerful slaves- will Squunge be able to convince the others that he's not lying this time?
Skeletor tricks He-Man into thinking he has accidentally killed a man- and consumed by guilt, He-Man transforms back to Adam and drops his sword down the abyss of Grayskull, deciding he is no longer worthy of Grayskull's powers. Skeletor then opens a portal to the goblin world, enabling General Tataran's army to enter Eternia, with possibly enough power and strength to conquer the planet. Can Eternia survive without its greatest hero... and will Adam realise he has been tricked before it is too late?
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!
Chad (from the episode "Double-Edged Sword") comes to Eternos with his older brother, Johno, who is about to be presented with an award for 'boy of the year'. However, Johno is secretly caught up in an obsessive drug addiction- he has been paying Count Marzo for sniffs of The Black Nightmare, a dangerous plant which originated on Trolla. The drug drives Johno to attempt a dangerous stunt during the 'boy of the year' ceremony, which humiliates him and causes King Randor to withdraw his award. However, naive young boys have been impressed by Johno's stunt, and Count Marzo uses the drug-addicted boy to lure them all to his evil services so he can use the flower to get them all under his power... when the heroic warriors realise what is happening, it is down to them to foil Marzo's plan and rescue Johno from his addiction before the children of Eternia are doomed.
He-Man and Man-At-Arms discover a crashed spaceship piloted by a robot. They take him back to the palace, where Man-At-Arms manages to repair the robot, who tells them his name is Roboto and he is a space explorer from the planet Robotica. He expresses his interest to explore Eternia, but during the night he is captured by Modulok, Man-At-Arms' sworn enemy! Modulok reprogrammes him to do his own dirty work, which involves the dastardly experiment of transplanting Man-At-Arms' brain into Modulok's extra head.....
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.
Adam, Teela and Orko are enjoying some recreation (while Cringer sleeps!) when they notice that no time seems to have passed since they began. After He-Man has rescues a young girl by from a giant underground creature confused by the stop of time, the girl turns out to be Princess Kaffay, daughter of the Emperor of Sinba. She explains that evil wizard Hexon has captured her father and the Keeper of Time, and has used his powers to effectively stop time from passing. It is written that the Emperor must appear to the Council of Seasons on the first day of Spring, and request permission to rule for another year. With the Emperor captured and the stopping of time causing disarray, Hexon plans to step in and take the throne for himself...
Man-At-Arms is testing out a new duplicating machine, which can make a replica of any solid object. However, the machine is not yet perfect and so its replicas come out being half the size of the original objects. But Skeletor steals the machine, and he uses it to create a whole army of miniature Skeletors to do his bidding... and before long, the palace is overrun with Skeletors!
Skeletor captures Teela and Orko, and sends them to be imprisoned in the dark, dismal kingdom of Morragor, ruled over by an enslaved monster in thrall to Skeletor. But the monster, despite his gruesome appearance, comes across as noble and friendly, and treats his captives with utmost dignity. As He-Man journeys to rescue his friends, Teela, seeing the monster's true personality beneath the surface, encourages him to break himself free from his unwilling devotion to Skeletor.
Beast Man and Trap Jaw go into business for themselves, having stolen the Amber Crystal of Milaka. They use the Crystal to capture Orko and hold him to ransom, for all the Photanium in Eternia. As He-Man and Man-At-Arms set about looking for a way to rescue Orko without meeting the ransom demand, the imprisoned Orko uses his magic to the effect that Beast Man and Trap Jaw wish they'd never captured him in the first place...
Two Earth astronauts, Mark Blaze and Andrea Steele, are on a mission to save Earth from a meteor that is about to collide with the planet. but on their mission, they are sucked through the same portal which brought Marlena to Eternia, and they find themselves on Eternia, now ruled by the missing astronaut Marlena Glenn. And things turn drastic when Skeletor captures Blaze, and steals the ship's missile, intending to use it to blow up Grayskull! Can He-Man stop Skeletor's scheme... and can he help Blaze and Steele to save Earth before it is too late?
The residents of the small village of Ruckstown are living in permanent fear of a monster they call 'The Tingler' that is said to live on Mount Fear, which overlooks the village. In the hope of hunting down and catching the Tingler, they call Prince Adam and Teela to their aid. Orko and Cringer accompany them, but soon they find themselves captured by the Tingler himself and taken to his home... but once they've got to know him, they find that The Tingler isn't as bad as the locals think...
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?
Mekaneck is missing his long-lost son Philip, who mysteriously vanished years ago, when he and his father were caught in an intense storm. But out of the blue, the evil Count Marzo reveals that he saved Philip from the storm and has been holding him captive ever since, using him as a servant. He offers to return Mekaneck's son in exchange for the King and Queen of Eternia, so Marzo can rule the planet himself. Although he is thrilled to have found out his son's whereabouts, Mekaneck refuses Marzo's offer, out of devotion to the King and Queen. But, determined to gain the throne of Eternia for himself, Marzo captures the King and Queen as they set out to visit the hive of the Bee People, and it is up to He-Man and Mekaneck to rescue both the King and Queen, and Mekaneck's son!
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?
A villain called the Toy Maker offers his services to Skeletor, saying he creates toys which appear harmless at first, but are capable of growing to giant size and obeying his every command. Between them, the Toy Maker and Skeletor devise a plot. The Toy Maker sells his toys to Orko, then when Orko takes them back to the palace, the toys grow to giant size and capture Man-At-Arms. He-Man and his friends set out to rescue Man-At-Arms, while Skeletor plots to use the toys to capture He-Man as well.
An evil king from the Dimension of Evil has kidnapped a good wizard. In order to get his freedom back, his daughter makes a bargain that she will kidnap the Star Child so that the evil king can look upon her. However, she soon finds out that she's bee duped when the evil king breaks his bargain and transports her, the Star Child and the heroes (along with the Star Child's body guard) to his dimension, hoping to force the Star Child to use her powers to open a gate to Eternia for himself and his forces to come through and take over.
Remembering the failure of his last attempt to control The Cosmic Comet, Skeletor decides he can only control the comets if he controls Zagraz, the comet keeper. He sends Two Bad out to capture Zagraz, and with the comet keeper in his clutches, Skeletor sets out using the comets to attack the Royal Palace and Castle Grayskull.
Prince Adam, Melaktha and Moss Man set sail on an archaeological expedition to the lost island continent of Avathar. When exploring the ancient ruins of the island they come across its legendary mirror, which holds all the greatest knowledge within its glass. They load the mirror onto the ship for their return journey, but its safety is threatened by a disguised Trap Jaw spying on them, and a storm at sea.
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.
There is a bit party at the palace and everyone is invited, except for Skeletor and co. They go to the forest and capture animals which they let loose at the party so He-Man has to intervene to save the day.
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!