Season 1, Episode 1: Exodus23 January 1985
As their home world is about to explode, the Thundercat Nobles escape. Their engine is damaged so they can't go to their intended destination. While the others enter sleep chambers to survive the long journey, their leader Jaga remains awake to pilot the ship as long as possible since their navigation system is damaged. One they land on Third Earth, the Thundercats must deal with old enemies who have followed them, and face all the challenges that await them on Third Earth.
23 January 1985
Needing allies, Mumm-ra bends the Mutants to his will. The Mutants go after the Thundercats. In the meantime the Thundercats try to adapt to their new surroundings.
Season 1, Episode 3: Berbils11 September 1985
The Thundercats encounter the Berbils, when the Berbils are attacked, the Thundercats defend the Berbils. The Berbils explain that the group who attacked them were ordered to so by some Giantsour. The Thundercats then have to protect the Berbils from the Giantours.
12 September 1985
While playing in the forest, Wilykit and Wilykat discover that the mutants have enslaved a slow-minded race of beings as a means of slave labour to construct their own fortress: Castle Plun-Darr.
Season 1, Episode 5: Pumm-Ra13 September 1985
Mumm-Ra takes the guise of Pumm-Ra, a Thunderian, to infiltrate and sabotage Cat's Lair.
16 September 1985
Lion-O must defend a herd of unicorns and rescue snarf from the threat posed by a gang of pirate raiders known as the Berserkers.
17 September 1985
When Tigra rapidly ages after falling under the deadly enchantment of a place known as the Cave of Time, the Thundercats must figure out how to stop it before it's too late.
18 September 1985
Lion-O and Wilikit must rescue Wilicat from the ultimate fortress.
19 September 1985
While investigating an earthquake, Tigra stumbles upon a magical garden and meets a talking flower named Silky who offers him her fruit. It turns out that she is another one of Mumm-Ra's disguises and the fruit has made Tigra his slave.
20 September 1985
Lion-O helps Mandora, an interstellar police officer, retrieve three of the worst criminals in the galaxy after he accidentally releases them.
23 September 1985
A tomb is accidentally opened, releasing a ghost who used to terrorize Third Earth. The ghost has a special interest in the Thundercats. The Thundercats must figure out who the ghost was in life and his connection to their past.
24 September 1985
Mumm-Ra plots to open a time warp prison and release the evil princess Ta-She, who has the deadly power to control all men with her gaze.
25 September 1985
When a meteorite the Thundercats can use to replenish their dwindling energy supply crashes on Hook Mountain, Lion-O must win a duel with the fierce Snowman before they can have it.
26 September 1985
The Mutants convince Mumm-Ra to raise their ship from beneath the desert so that they may build better weapons and vehicles to more effectively battle the Thundercats.
27 September 1985
The Thundercats search desperately for a precious device which has all the recorded history of Thundera up until the time of its destruction.
30 September 1985
The Mutants devastate the Cat's Lair, the Warrior Maidens, and much of the surrounding countryside with a powerful long-range fire-cannon they have constructed on Castle Plun-Darr.
1 October 1985
Mumm-Ra tricks Lion-O into using the Sword of Omens against another Thundercat, causing it to break in half. The only way Liog-O can restore it is to venture into the heart of a volcano.
2 October 1985
Mumm-Ra switches the real Panthro with a clone infused with the spirit of Hammerhand and sets it free to cause terror and carnage, leaving the Thundercats to take all the blame.
Season 1, Episode 19: Mongor3 October 1985
Mongor, a terrible demon that feeds on the power of fear, is accidentally set free from his prison by Wilykit and Wilykat to terrorize Third-Earth.
4 October 1985
Lion-O accidentally activates the time capsule, which hurls him back in time to Thundera exactly one day before its destruction. Meanwhile, the Mutants assault Cat's Lair with their most powerful and deadly weapon yet.
7 October 1985
The Thundercats help an undersea professor to protect a machine that prevents the oceans of Third Earth from literally going down the drain.
8 October 1985
Jaga is captured by Nemex, an evil being from the Astral world, and Lion-O tries desperately to find a way to rescue his old mentor.
9 October 1985
Lion-O must brave an ice palace to save a sacred bird from a cruel and greedy queen's clutches.
Season 1, Episode 24: Safari Joe10 October 1985
The Thundercats must match wits with Safari Joe:the most successful big-game hunter in the galaxy.
11 October 1985
When Mumm-Ra's latest evil scheme succeeds and every single Thundercat is captured, only Snarf is left to save the day.
28 October 1985
An alien ship crashes on Third Earth and forms a connection with Cheetara through her sixth sense. Only she can save it when the Mutants attack.
29 October 1985
Mumm-Ra tricks Hachiman, a mighty samurai from a distant planet into believing the Thundercats are evil invaders. Hachiman sets out to destroy them.
30 October 1985
Vultureman builds a deceptively diminutive infiltration robot and Mumm-Ra arms it with miniaturization gas which shrinks the Thundercats down to size.
31 October 1985
Vultureman summons Rataro and his battleship who kidnaps Snarf's nephew to use as bait to trap the Thundercats.
1 November 1985
The Thundercats race to try and salvage a part they need for the Feliner before the Mutants attack. Meanwhile, Snarf considers leaving to be with his own kind.
4 November 1985
Mandora inspects a space freighter that turns out to be the ship of the evil pirate robot Cracker, and she needs Lion-O's help.
5 November 1985
It's a race against time when Mumm-Ra orders Driller to bore a tunnel from an acid lake to the Cat's Lair.
6 November 1985
Wizz-Ra, a mighty sorcerer and Mumm-Ra's ancient enemy, emerges after 7000 years of imprisonment in another dimension through a mirror in the Cat's Lair.
7 November 1985
Mumm-Ra uses the birth of a powerful spider-queen to his advantage by luring the Thundercats into her deadly web.
8 November 1985
An S.O.S. from deep space turns out to be a trap set by Captain Shiner, a space mercenary working for Mumm-Ra.
11 November 1985
Wilykit and Wilykat find a magic harp containing a genie named Charr-Nin. Mumm-Ra later offers to free him in exchange for destroying the Thundercats.
12 November 1985
Lion-O is the hereditary Lord of the Thundercats. Now he has reached the age where he must prove his worthiness. He must face each of Thundercats in different trials/tests, without the Sword of Omens. First up, Panthro.
13 November 1985
When the Thundercats face Demolisher, a warrior who battles opponents purely for the sport of it, Lion-O teaches him the true meaning of honor.
14 November 1985
Monkian goes to Mumm-Ra's pyramid and agrees to give anything if Mumm-Ra will make him powerful enough to defeat the Thundercats.
15 November 1985
After a disagreement, Vultureman leaves castle Plunn-darr and destroys all the mutant's technology. To even the odds, Slithe convinces Mumm-Ra to magically disable all the technology in Cat's lair.
18 November 1985
The Micrits are tiny humanoids, their village keeps getting destroyed when the Thundercats drive their vehicles through the area. The Micrits decide to fight back, and end up taking two hostages.
19 November 1985
Lion-O's trial to become the Thundercat Lord continues. Now he must race against Cheetara. But now the Mutants and Mumm-ra have found out about his trials. They'll stop at nothing to keep Lion-O from succeeding.
20 November 1985
When all technology fails, Lion-O must rely on his own cunning and the forces of nature when a seemingly invincible titan is unleashed upon Third Earth.
21 November 1985
The normally submissive Jackalman decides to start his own army in the hopes of conquering Third-Earth himself.
22 November 1985
The Thundercats are asked to help the Tuska defend them from the Technopede, an evil robot that is devastating their homeland.
25 November 1985
Lion-O must now face off against Wily Kat and Wily Kit. It's a race through a cavern, with Wily Kat and Kit, playing tricks on Lion-O. They must also contend with Mutants, and Lion-O meets a race who dwell in the caverns and who don't like people from the outside.
26 November 1985
Mumm-Ra disguises himself as an injured Ro-Bear Berbil to infiltrate Cats Lair.
27 November 1985
The Thundercats face a desperate struggle when Mumm-Ra resurrects various powerful mechanical foes they have defeated in the past in his latest scheme to wipe them out.
Season 1, Episode 49: Trapped28 November 1985
When a big storm hits Third-Earth, Wilykit and Wilykat are trapped in an old space capsule.
29 November 1985
Lion-O's faces off against his final Thundercat, Tygra. Tygra can create illusions, he's been conserving his energies for these trials. Can Lion-O tell which danger is real, and which is not? The mutant continue their interference.
Season 1, Episode 51: Excalibur2 December 1985
Mumma-ra learns about Excalibur, the greatest sword ever created. He changes into King Arthur, and asks the Lady of the Lake for Excalibur. He meets with the Thundercats, who greet him as a potential ally. Soon "Arthur" challenges Lion-O to a duel, which he foolishly accepts. They will all learn which sword is stronger, the Sword of Omens, or Excalibur.
3 December 1985
The Thundercats must solve a thousand-year-old mystery if they're to stop the curse of a powerful ice-ogre who assaults Hook Mountain Castle.
4 December 1985
Lion-O learns the meaning of not judging by appearance when he is caught up in the conflict between an ugly yet gentle being, and an angelic yet wicked one.
5 December 1985
An unknown ship containing a dangerous radioactive substance approaches Third-Earth and the Mutants and later Mumm-Ra try to use the powerful materials within to destroy the Thundercats.
6 December 1985
Vultureman invents a voice imitator that the Mutants use to deceive, drive apart, and almost conquer the Thundercats.
9 December 1985
Mumm-Ra transforms into the Dream master to invade the dreams and control the minds of the Thundercats.
10 December 1985
Due to a malfunction with his invisibility whip while rescuing a warrior maiden from the Mutants, Tygra is stuck invisible and needs help fast.
11 December 1985
During mountain climbing, Lion-O is attacked by the Mutants and an avalanche seals them in a cave. Meanwhile, Jackalman steals the sword from Lion-O.
12 December 1985
In his quest to rule Third-Earth, Vultureman invents a potion that makes him powerful enough to defeat the Mutants, Mumm-Ra and even the Thundercats.
13 December 1985
The Thundercats play a joke on the Mutants by creating a fake Sword of Omens for them to steal, only to have it backfire when they later capture Snarf.
16 December 1985
Lion-O's final test to become the true Lord of the Thundercats. He must defeat his greatest enemy, without the Sword of Omens, and no help from the other Thundercats. He must defeat Mumm-Ra.
17 December 1985
Yearning for more respect by the older Thundercats, Wilykit and Wilykat borrow their weapons for practice, only to have them stolen by the Mutants.
Season 1, Episode 63: Mumm-Rana18 December 1985
Mumm-Ra meets his exact opposite in Mumm-Rana, a priestess of light. He battles her and manages to take over her mind with dark magic, and then uses her fearsome powers against the Thundercats.
19 December 1985
Vultureman invents a device that can switch one mind with another. He uses it to transfer Snarf's mind into Panthro's body, and vice-versa.
20 December 1985
Under the guise of Dr Dometome, Mumm-Ra lures Lion-O to a place where he is forced to fight phantoms of foes from the past in an attempt to eliminate the lord of the Thundercats.
7 September 1987
Mumm-Ra is weak and faces the threat of three new Thundercats, so he sends the Mutants to release his old enemies the Lunataks from their imprisonment in order to bolster the forces of darkness.
8 September 1987
The Mutants succeed in releasing the Lunataks, who immediately begin looting Thundrillium and taking slaves from the local villages, leading to their first run-in with the Thundercats.
9 September 1987
The Thundercats build the Tower of Omens to monitor for new and dangerous enemies. Meanwhile, Ma-Mutt, disguised as a Berbil, spies on the Thundercats.
10 September 1987
Mumm-Ra's power is restored, and Snarfer makes it to Third-Earth but crashes in the Lunataks territory, leading the Thundercats to rush to find him before they do.
11 September 1987
In searching for the Lunataks flying fortress Sky Tomb, the Thundercats discover that Mumm-Ra is alive again and more powerful than ever before, leading to an epic battle between him and Lion-O.
Season 2, Episode 6: Catfight14 September 1987
Mumm-Ra takes the form of Jaga and creates dissent within the ranks of the Thundercats, causing them to fight each other.
Season 2, Episode 7: Psych Out!15 September 1987
The Lunatak Alluro uses a powerful talisman on the Thundercats that takes away all their self-confidence, leaving them hopeless and confused.
16 September 1987
In his latest evil scheme, Mumm-Ra plans on using the legendary Mask of Gorgon, an artifact which turns all to stone, against the Thundercats.
17 September 1987
After venturing into a remote cave on Hook Mountain in search of Thundrillium, the Lunataks and later the Thundercats fall victim to a bizarre entity with the power to expand upon the negative influences in a person's soul.
18 September 1987
Mumm-Ra summons the Berserkers and coats their armour in Thundrainium and sends them to assault the Thundercats at the Tower of Omens.
21 September 1987
Ravage Island is an island on Third-Earth with a powerful beacon on it that can control minds. Mumm-Ra seeks to use the beacon to make the Thundercats his slaves.
22 September 1987
Thanks to an unfortunate mishap with a time capsule, Lion-O rapidly grows younger and younger. His fellow Thundercats must reverse the process before he ceases to exist.
23 September 1987
Vultureman builds a powerful sonic gun with a sound stone he steals from the Lunataks territory of Darkside.
24 September 1987
The day of the eclipse arrives and any spell Mumm-Ra casts will last until the next eclipse. He casts a spell of decay on the Cats Lair, causing it to fall apart.
Season 2, Episode 15: Sideswipe25 September 1987
Chilla freezes Snarfer's spaceship as he heads back to the Tower of Omens. When Mandora gets involved, Chilla freezes her and becomes a fugitive from the law.
28 September 1987
Luna discovers that her grandmother's magic belt is in the possession of Mumm-Rana and heads straight for the Pyramid of Light to claim the artifact and greatly increase her own power.
29 September 1987
Luna tricks Hachiman and steals his sword, the Thunder-Cutter, and gives it the Lunataks new samurai robot, the Automaton.
Season 2, Episode 18: Runaways30 September 1987
Feeling neglected, Wilykat and Wilykat decide to run away to teach the rest of the Thundercats a lesson. However, thanks to Mumm-Ra, not all goes according to plan.
1 October 1987
When all of the Thundercats except Lion-O are gone, Mumm-Ra switches Snarf with Ma-Mutt, who gives Lion-O poisoned candy fruit.
2 October 1987
Vultureman builds a devastating device called the Thundranium projector which Wilykat and Wilykit manage to ruin. In return, he damages their space boards, putting them in major peril.
8 September 1986
A nightmare torments Lion-O. He believes that he was saved from his erupting planet as a youngster at the sacrifice of three other Thunderians. Jaga informs the now grown Lion-O that his nightmare is false.
9 September 1986
Lion-O raids the Berserker's ship, but the rescue attempt fails and the captured Thunderians are taken to Fire Rock Mountain after another failed attempt on their part to break free from their captors. Weakened by the Thundrainium, the thunderians are trapped on the mountain.
10 September 1986
On Hook Mountain, Lion-O prepares to battle Monikan in the Fistpounder, when they are caught in an avalanche.
11 September 1986
The sun drains the powers of Mumm-Ra's mummy bandages and Lion-O escapes from their grasp.
12 September 1986
Weakened by the Thunderians pits below, Lion-O hangs from the bridge at Fire Rock Mountain. Hachiman finally realizes that Mumm-Ra tricked him into believing that Lion-O had turned evil.
5 September 1988
Mumm-Ra learns of the legendary Treasure of Thundera and the Sword of Plundar, which destroyed Thundera. He and Ma-Mutt travel back in space and time to search the debris of the planet for the sword.
6 September 1988
Exploring the newly reformed New Thundera, the Thundercats discover that Mumm-Ra is using all the Snarfs as slave labour to dig for the lost Treasure of Thundera.
7 September 1988
Mumm-Ra retrieves the Sword of Plundarr as the Thundercats arrive on New Thundera. While the Thundercats try to retrieve the sword and treasure, Snarf tries to find a way to free his fellow Snarfs.
8 September 1988
The Mutants arrive and Mumm-Ra has them lure the Thundercats to a strange place where, except for Lion-O, they are all transformed into child versions of themselves.
9 September 1988
Lion-O frees the child Thundercats from Mumm-Ra's spell, and then confronts him to retrieve the fabled Book of Omens.
12 September 1988
Mumm-Ra finds the Treasure of Thundera called the Totem of Dera, which has the power to heal and bring inanimate objects to life, and gives it to Vultureman that he might turn it into a device of destruction to use against the Thundercats.
13 September 1988
Lion-O learns of the Chain of Loyalty, and Jaga instructs him to retrieve it from New Thundera. But when Mumm-Ra breaks the chain, the Thundercats turn on each other, and Lion-O must find a way to stop them from destroying themselves.
14 September 1988
The Thundercats search a canyon of crystals for one of the Treasures of Thundera known as the Keystone, an item which has the power to heal, but also corrupts and enslaves the unwary.
15 September 1988
Vultureman uses a new weapon on Cheetara to overwhelm her sixth sense and destroy her belief in herself and block her awareness of greater dangers.
Season 3, Episode 10: Exile Isle16 September 1988
The Thundercats capture the Lunataks and exile them to Exile Isle, an asteroid in deep space far from Third Earth. There the villains soon meet up with the Captain Cracker and hatch a plan of escape.
19 September 1988
While attempting to decode the Book of Omens Lion-O inadvertently traps himself within it. Mumm-Ra later steals the book, later becoming imprisoned in it himself.
20 September 1988
Tygra, Panthro, and Cheetara return to New Thundera to locate more of the Treasure of Thundera, but Mumm-Ra lures them to the mystical Canyons of Youth, which transforms them into children once again.
21 September 1988
Alluro's new Superfuel formula for Sky Tomb's engines causes the local plant and animal life to grow to massive proportions. The Lunataks give it to the Mutants, who sprinkle it around Cat's Lair.
22 September 1988
The Locket of Lies is a magical object created by Mumm-Ra to appear as a part of the Treasure of Thundera. When opened, the gems inside act as a compass that points the way to the remaining treasure.
23 September 1988
When the Thundercats bring back more of the Treasure of Thundera. Snarf is fascinated by a bracelet and sees that when adorned, it, makes everyone obeys him. Mumm-Ra becomes aware of this, and will stop at nothing to make it his own.
26 September 1988
The Lunataks hook up exercise machines to generate Sky Tomb's engines, but their own laziness forces them to kidnap the Thundercats and force them to do the hard work.
27 September 1988
Lion-O recovers a mysterious telescope from the wreckage of the original spaceship. Mumm-Ra recognises it as the Thunderscope, which allows its user to locate pieces of the Treasure of Thundera.
28 September 1988
Mumm-Ra discovers the power of one of the pieces of the Treasure of Thundera, the Jade Dragon, which possesses the power to entrap people in its stomach.
29 September 1988
When an inter-stellar circus train comes to town, the Thundercats seize the opportunity to rid themselves of both the Mutants, and the Lunataks.
30 September 1988
Fed up with Mumm-Ra's failures, the Ancient Spirits of Evil give him one final day to rid Third Earth of the Thundercats.
4 September 1989
The Thundercats depart Third Earth for New Thundera, leaving Tygra and Pumyra behind to watch over the Cat's Lair and Tower of Omens. Meanwhile, the Ancient Spirits of Evil resurrect Mumm-ra, building a new pyramid on New Thundera.
5 September 1989
More and more earthquakes are occurring on New Thundera thanks to Mumm-Ra's sabotage of an arcane machine that lies at the center of the planet that holds its gravity together, watched over by the ancient Thunderian sorceress, Jagara.
6 September 1989
Mumm-Ra sends Ma-Mutt disguised as Mandora to free the Mutants from the Circus Train. The Mutants are then ordered to get rid of Tygra and Pumyra back on Third Earth.
7 September 1989
Mumm-Ra sends Ma-Mutt, disguised as Mandora, to free the Mutants from the Circus Train. He then sends them to Third-Earth to eliminate Tygra and Pumyra.
8 September 1989
Mumm-Ra again seriously threatens to destroy the Gyroscope and thereby the newly reformed New Thundera. Jaga helps Lion-O think of a solution once and for all.
Season 4, Episode 6: Leah11 September 1989
The Ancient Spirits of Evil bring a creature to Mumm-Ra called a Mirror Wraith, which he transforms as a doll and gives to a lost thunderian child named Leah, who keeps it and unwittingly puts the Thundercats in great danger.
Season 4, Episode 7: Frogman12 September 1989
Wilykit and Wilykat accidentally release Frogman. Seemingly harmless at first, he is soon revealed as a ruthless villain with the fearsome power to control all water.
13 September 1989
While exploring New Thundera, Wilykit and Wilykat stumble upon a mysterious orb of gold and pick it up, believing it to be one of the Treasures of Thundera. However, it soon transpires that that is not the case.
Season 4, Episode 9: Screwloose14 September 1989
Jagara cannot work the new Gyroscope alone, so the Thundercats send for someone to aid her. Screwloose, a robot who specializes in the technology, comes to Third Earth. But, Mumm-Ra tampers with his programming, making him destructive.
Season 4, Episode 10: Malcar15 September 1989
Mumm-Ra resurrects the ancient alchemist Malcar, but he returns old and weak. Mumm-Ra then sends him to the Canyons of Youth, which will restore his youth and power so that he may effectively defeat the Thundercats.
18 September 1989
Panthro, Snarf, and later even Mumm-Ra fall prey to the waters of the Swamp of the Laughing Lillypads-which unless cured, will cause them to laugh until they die.
19 September 1989
The twisted robo-pirate Captain Cracker frees the Lunataks from the Circus Train and they all plot to assault Third Earth, since most of the Thundercats are on New Thundera.
20 September 1989
While on a solo trip to New Thndera, Tygra crash lands in an unexplored region of the planet's moss-land. There he is captured by a mysterious and mighty gigantic swamp beast.
21 September 1989
Mumm-Ra has a powerful device called the Babylonian Babarian Boiler, that he plans to use against the Thundercats. However, the bumbling Ma-Mutt accidentally destroys the machine, causing an enraged Mumm-Ra to banish him from the pyramid.
22 September 1989
The Ancient Spirits of Evil unleash the Shadowmaster, a dark sorcerer who may be even more powerful than Mumm-Ra. Fearing the Sprits will favour the Shadowmaster over him, Mumm-Ra hatches a secret plot to aid his enemies the Thundercats.
Season 4, Episode 16: Swan Song25 September 1989
An ecology inspector comes to New Thundera to inspect the new Cat's Lair. His ship uses the Space Way Airborn Navigation system to direct him to planets throughout the universe. Upon arriving he is ambushed by Two-Time, who steals the ship.
26 September 1989
Mumm-Ra reluctantly summons up the treacherous tentacled demon Amortus, who has the formidable ability to turn all living things into stone.
27 September 1989
Vultureman escapes the Circus Train by hijacking a bookmobile. He discovers information about a powerful enemy of Mumm-Ra, Zaxx. Using this knowledge, Vultureman plots to overthrow Mumm-Ra and rule the universe.
28 September 1989
Lion-O unwittingly drinks tainted water from the devastating Well of Doubt, which causes him to lose all his courage and self belief.
29 September 1989
The key to the Book of Omens is finally solved and it is unlocked. All of the team must pass different tests to save the planet, and Lion-O faces many trials within the book to prove himself once and for all as Lord of the Thundercats.
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