The inhabitants of the planet Thundera evacuate just before it is destroyed. They were pursued by a band of mutants. All but one of their escape ships was destroyed. Only a small group of Thunderians (Thundercats) remained. With only half engine power, the group, which was led by Jaga, had to set a course for the nearest planet. Jaga commanded their ship while the other seven were in their stasis tubes. Jaga died on their journey to Third Earth and their ship crashed there. Soon they made friends with various groups in the area and they designed a fortress. Mumm-Ra the centuries-old embodiment of evil, along with the mutants that destroyed the rest of the Thunderians are a constant threat. But Lion-O, the new leader of the Thundercats, with his weapon the "Sword of Omens" will help the Thundercats to have a standing chance.
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Air Date: 1985-01-23
With their home planet, Thundera, about to explode, the Thunderians flee to a distant galaxy. Before they can make th...
Air Date: 1985-01-23
The Mutants, who have also reached Third Earth, encounter an old pyramid. It turns out to be the home of Mumm-Ra the ...
Air Date: 1985-09-11
The Ro-Bear Berbils are a friendly group of robot bears that live on Third Earth. Lion-O and Snarf don't know this, a...
Air Date: 1985-09-12
The homeless Mutants also make plans to build their home. They enslave a primitive race of beings called Brute-Men to...
Air Date: 1985-09-13
Mumm-Ra uses his shapeshifting abilities to pass himself off as a Thunderian so he can stage the "rescue" of Cheetara...
Air Date: 1985-09-16
When Snarf and a young unicorn are captured by the pirate Hammerhand and his crew of Berserkers, Lion-O goes to rescu...
Air Date: 1985-09-17
With their supply of Thundrillium running low, the Thundercats set off in search of a fresh supply. Tygra detects a l...
Air Date: 1985-09-18
Wilykit and Wilykat try to stop a band of living gargoyles from robbing a Wollo but fail to do so and trail the gargo...
Air Date: 1985-09-19
While investigating an earthquake, Tygra stumbles across the Garden of Delights and meets a talking plant named Silky...
Air Date: 1985-09-20
Lion-O and Snarf stumble upon a portable jail cell, and mistakenly open it up. Three of the galaxy's worst villains e...
Air Date: 1985-09-23
Two Bolkins (sheep-like beings from Third Earth) unleash the ghost of Grune the Destroyer, a renegade Thundercat who ...
Air Date: 1985-09-24
Mumm-Ra and the Mutants plot to open the Time Warp Prison and release the evil Princess Ta-She in order to use her de...
Air Date: 1985-09-25
When a meteorite made of pure Thundrillium crashes on Hook Mountain, the Thundercats decide to use it to replenish th...
Air Date: 1985-09-26
Tired of constantly being bested by the Thundercats, the Mutants have Mumm-Ra raise their spaceship and salvage their...
Air Date: 1985-09-27
Lion-O becomes homesick, and his memories of Thundera are almost nonexistent. Jaga appears to Lion-O and tells him th...
Air Date: 1985-09-30
The Mutants, once again searching for a way to destroy the Thundercats, recover some more items from their spaceship....
Air Date: 1985-10-01
Mumm-Ra tricks Lion-O into using the Sword of Omens against Tygra, causing the blade to break in half and lose its po...
Air Date: 1985-10-02
Mumm-Ra creates device that can make Panthro clones. He embeds the spirit of Hammerhand into his clone and sets it fr...
Air Date: 1985-10-03
Wilykit and Kat accidentally free an ancient monster that was banished to an old shrine centuries ago. The evil monst...
Air Date: 1985-10-04
The Thundercats briefly show Lion-O how the time capsule they recovered from the caveman works. Curious to see more, ...
Air Date: 1985-10-07
An old scientist seeks the Thundercats to help him save the oceans of Third Earth. Long ago, a crack was made in the ...
Air Date: 1985-10-08
Jaga is captured by Nemex, an evil being in the Astral World, and Lion-O tries to find a way to rescue him. Third Ear...
Air Date: 1985-10-09
The Thundercats think that Snarf is getting too old, and that he is not up to doing as much as he does. To prove them...
Air Date: 1985-10-10
An evil hunter lands on third earth in search of prey to hunt. His holographic machine can tell him about all of the ...
Air Date: 1985-10-11
Nearly all the Thundercats have been captured by the Mutants and imprisoned in Mumm-Ra's Pyramid, forcing Snarf to us...
Air Date: 1985-10-28
An alien spaceship crash lands on third earth, and it can somehow communicate with Cheetara through her sixth sense. ...
Air Date: 1985-10-29
Mumm-Ra summons the great samurai Hachiman to seek and destroy Lion-O. He tells Hachiman that Lion-O and the Thunder...
Air Date: 1985-10-30
Mumm-Ra has a phial of miniaturization gas. Vultureman builds a mechanical Wolfrat to infiltrate the gas into the Cat...
Air Date: 1985-10-31
Vultureman summons Ratar-O to take him to the planet of the Snarfs to capture one of them and use it as ransom with t...
Air Date: 1985-11-01
The ThunderCats race to try to salvage the part they need for the Feliner from the wreck of the Rat Star before the M...
Air Date: 1985-11-04
Mandora, on space-patrol, encounters an old pirate ship which doesn't meet inter-galactic standards. She boards the ...
Air Date: 1985-11-05
The Driller, Mumm-Ra's servant who captured Panthro for him in Spitting Image, returns to aid Mumm-Ra once again. His...
Air Date: 1985-11-06
Wiz-Ra, Mumm-Ra's enemy from long ago, comes back every 7000 years through a portal that just happens to be in Cheeta...
Air Date: 1985-11-07
Mumm-Ra finds out that the Kingdom of Webs has a new Queen, Spidera. Mumm-Ra thinks he can lure Lion-O into her lair...
Air Date: 1985-11-08
Mumm-Ra hires Captain Shiner to send a fake distress signal to the ThunderCats. With their new vehicle, the Feliner,...
Air Date: 1985-11-11
Wilykit and Kat find an ancient harp that has a genie in it. His name is Charr-Nin. Mumm-Ra appears to the genie and...
Air Date: 1985-11-12
On Lion-O's 20th birthday, he must pass a set of trials to become the true Lord of the ThunderCats. Even though he is...
Air Date: 1985-11-13
A vagabond space traveler lands on Third Earth to challenge Mumm-Ra to a fight. The Demolisher is victorious against...
Air Date: 1985-11-14
Monkian goes to Mumm-Ra and agrees to give him anything if Mumm-Ra will make him powerful enough to rule Third Earth....
Air Date: 1985-11-15
After the Mutants fail to ambush and defeat the Thundercats with Vultureman's new Thundrainium cannon, Vultureman, fu...
Air Date: 1985-11-18
Micrits, a tiny race of human-like figures, happen to live right outside Cats' Lair. Unaware of their existence, Lio...
Air Date: 1985-11-19
On the second day of his trials, Lion-O must race Cheetara through the dangerous lands of Third Earth. Although Cheet...
Air Date: 1985-11-20
Mumm-Ra awakens the Rock Giant, an ancient monster made of stone which looked like a mountain to the TCats. When it w...
Air Date: 1985-11-21
The normally submissive JackalMan decides to start his own army in hopes of conquering Third Earth by himself. He doe...
Air Date: 1985-11-22
An evil robot monster is attacking the Tuska Village, in an area unexplored by the Thundercats. Turmagar, the leader ...
Air Date: 1985-11-25
Wily Kit and Kat stand in Lion-O's way on the third day of his trials. Lion-O must beat them through the maze of infi...
Air Date: 1985-11-26
Mumm-ra transforms himself into a ro-bear berbil (a Thundercat ally). He acts hurt and the Thundercats let him stay a...
Air Date: 1985-11-27
Panthro invents flying video cameras which are suppose to record the events that take place on third-earth so they co...
Air Date: 1985-11-28
When a big storm hits Third Earth, the Thunderkittens are trapped in an old space capsule. Meanwhile, Tygra and Cheet...
Air Date: 1985-11-29
Lion-O undergoes the fourth task in his Anointment Trial.
Air Date: 1985-12-02
The story of Excalibur, the greatest sword in history, is revealed to Mumm-Ra, who is then determined to find the Exc...
Air Date: 1985-12-03
A giant Ice King is accidentally released from his glacial prison and attacks the Castle of the Snowmen.
Air Date: 1985-12-04
A Terator Starship, an extremely ugly spaceship, is pursued by a Kymera Craft, a visually appealing spaceship. The Te...
Air Date: 1985-12-05
A spaceship freighted with a lethal radioactive sphere is on a collision course for Third Earth.
Air Date: 1985-12-06
Vultureman invents a voice imitator that imitates the ThunderCats' voices. He uses it to lure the ThunderCats into pe...
Air Date: 1985-12-09
Mumm-Ra transforms into Mumm-Ra the Dream Master and summons spectral Dream Selves from the sleeping Panthro, Cheetar...
Air Date: 1985-12-10
Willa is practicing her long-bow skills when a warning device alerts her to a Mutant attack. Willa is captured and th...
Air Date: 1985-12-11
Mumm-Ra summons the Mutants and threatens to banish them from Third Earth unless they bring him the Sword of Omens.
Air Date: 1985-12-12
Vultureman invents a Super Power Potion which give him magical powers, enabling him to mesmerize and defeat Tygra.
Air Date: 1985-12-13
Jackalman ambushes Snarf and attempts to steal the Sword of Omens. This gives Panthro the idea to make a duplicate sw...
Air Date: 1985-12-16
The concluding trial in Lion-O's Anointment Trials pits him alone and weaponless against the evil Mumm-Ra.
Air Date: 1985-12-17
To prove themselves worthy of being ThunderCats, the ThunderKittens borrow the other ThunderCats' weapons and practic...
Air Date: 1985-12-18
The Feliner is attacked by the RatStar, manned by the Mutants. Jackalman, Monikan, and S-S-Slithe are ejected and sav...
Air Date: 1985-12-19
Vultureman invents the Shifter, a device that can switch personalities, and uses it on Panthro's personality and Snar...
Air Date: 1985-12-20
Mumm-Ra creates a museum where painting and statues come alive to oppose the ThunderCats.