80s Cartoons! Watch Thundercats Full-Length Episodes

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Exodus / Watch This Episode
The Pilot Episode. The Thundercats, Jaga, Panthro, Tygra, Cheetara, Lion-O, Snarf, and Wiley Kit and Wiley Kat, watch from a spaceship as their home planet, Thundera, blows up. The set a course for a distant planet, but on the way they are attacked by the Mutants from the planet Plun-darr. The damaged ship is now unable to make it to that planet, so while the other Thundercats sleep in Time-Suspension capsules, Jaga pilots the ship manually to Third Earth. Jaga manages to get them there, but he dies just before reaching the planet. Lion-O, the new lord of the Thundercats, goes from boyhood to manhood during the trip.

The Unholy Alliance / Watch This Episode
The mutants, who followed the Thundercats to Third Earth, meet Mumm-Ra, a being of immense evil. Mumm-Ra sinks the Mutants' space ship, in fear they might use it to call the other mutants and then destroy his pyramid with it. The Mutants, who are now stranded, team up with Mumm-Ra to try and get the Eye of Thundera from the Thundercats. The Mutants try first, but Lion-O holds them off. Then Mumm-Ra tries, but while he is battling Lion-O, he sees his reflection in Lion-O's claw shield, and Mumm-Ra is so horrified by the reflection, he has to fly away and thus is defeated.

Berbils / Watch This Episode
Mumm-Ra tries to destroy the other Thundercats with a rock storm while Lion-O and Snarf are out searching the woods. But the Thundercats hide in the new Thundertank that Panthro has built. Meanwhile, Lion-O and Snarf get captured by the Ro-Bear Berbils, who turn out to be friendly. Lion-O helps defend the Berbil village from an attack by the Trologs, who are trying to get the Berbils' food. Then Lion-O defends the village again from Mumm-Ra, who had turned into a huge insect. The Berbils, in return, decide to help the Thundercats build their new Lair. In this episode, Jaga also teaches Lion-O how to call the Sword of Omens to come to his hand when needed.

The Slaves of Castle Plun-Darr / Watch This Episode
The homeless mutants also make plans to build their home. But it would be impossible for three mutants to do it themselves. They enslave a primitive race of beings called Brute-Men to do their work for them. The Thundercats go to Castle Plun-Darr to free the Brute-Men from the mutants.

Pumm-Ra / Watch This Episode
Mumm-Ra uses his shapeshifting abilities to pass himself off as a Thunderian and stage the rescue of Cheetara and infiltrate Cats' Lair.

The Terror of Hammerhand / Watch This Episode
Lion-O goes to rescue Snarf and a young unicorn after being captured by the pirate Hammerhand and his evil crew of Berserkers.

The Ghost Warrior / Watch This Episode
Two locals accidently free the ghost of Grune the Destroyer, who had ravaged Third Earth centuries ago. He learns of the Thundercats' presence on Third Earth and drains the lair of its Thundrillium and attacks the Thundercats, who can't fight back too much since he's a ghost. Thanks to Cheetara's sixth sense, the Thundercats learn of Grune's history, that he was once a Thundercat and close friend of Jaga, but greed and power overcame him. Grune returns to the lair and Lion-O summons Jaga to fight Grune. Jaga and Grune battle it out, but Grune's battle club is made from Thundrainium. Lion-O gives Jaga the Sword of Omens and his strength to help him defeat Grune.

The Doomgaze / Watch This Episode
Mumm-Ra and the Mutants plot to open the Time Warp Prison and release the evil Princess Ta-She in order to use her deadly Doomgaze against the Thundercats.

Lord of The Snows / Watch This Episode
When a meteorite made of pure Thundrillium crashes on Hook Mountain, the Thundercats decide to use it to replenish their depleted energy supply. But Lion-O must first gain the trust of the fierce Snowman.

The Spaceship Beneath the Sands / Watch This Episode
Tired of constantly being bested by the Thundercats, the Mutants have Mumm-Ra raise their spaceship and salvage their vehicles.

The Time Capsule / Watch This Episode
Lion-O becomes homesick, and his memories of Thundera are almost nonexistent. Jaga appears to Lion-O and tells him that on their spaceship, they brought with them a time capsule which was basically a digital recording of Thundera, and its history up to the time it was destroyed. The Thundercats set out to search for their time capsule.

The Fireballs of Plun-Darr / Watch This Episode
The mutants, once again searching for a way to destroy the Thundercats, recover some more items from their spaceship which Mumm-Ra generously recovered for them. They take their ships engine and convert it into a giant fire-ball-shooting machine. The mutants terrorize third earth with their fire-balls, until the Thundercats go to castle Plun-Darr and destroy their dangerous new weapon.

All That Glitters / Watch This Episode
Mumm-Ra tricks Lion-O into using the Sword of Omens against Tygra, causing the blade to break in half and lose its powers. The only way Lion-O can restore the Sword is to venture into a volcano and have the Inflamer reforge it. But the Inflamer requires a payment of gold! Has Lion-O taken on more than he can handle?

Spitting Image / Watch This Episode
Mumm-Ra creates a device that can make Panthro clones. He embeds the spirit of Hammerhand into his clone and sets it free to destroy Third Earth. The planet's inhabitants blame the Thundercats for the terror because they think its the real Panthro destroying their villages and burning their crops. The real Panthro finally encounters his clone and, with the help of Lion-O, manages to destroy it. Enraged about his defeat, Hammerhand destroys Mumm-Ra's cloning device.

Mongor / Watch This Episode
Wilykit and Wilykat accidently free an ancient monster that was banished to an old shrine centuries ago. The evil monster Mongor begins to destroy the planet and is much stronger than the Thundercats. He captures all the elder Thundercats with his powers. Wilykit and Wilykat return to the shrine to find a way to destroy him. They report back to Lion-O and tell him that in order to destroy Mongor he has to fight the monster without looking at it. Lion-O defeats the monster and all is returned to normal.

Return To Thundera / Watch This Episode
The Thundercats briefly show Lion-O how the time capsule they recovered from the caveman works. Curious to see more, Lion-O activates it during his night-time watch, and gets caught in it nuclear projection rays. The rays send him back in time to Thundera, just before the final tremor that destroyed the planet. Meanwhile, the mutants have built an evil robot monster that is destroying the cats lair, and the other Thundercats. Back on Thundera, Lion-O encounters his father, Claudus, and saves him from a mutant attack. In return, Claudus gives Lion-O the plans to the robot that was destroying the Thundercats in his own time.

Dr. Dometone / Watch This Episode
An old scientist seeks the Thundercats to help him save the oceans of Third Earth. Long ago, a crack was made in the bottom of the ocean which caused the water to drain into the earth's core. Dr. Dometone created a plug which sealed the hole in the ocean, and saved Third Earth from destruction. Now, an evil plundarrian, Scrape, has come to Third Earth to remove the plug and mine the rock that is found on the bottom of the ocean, a rock that powers his planet - Blue Plun-Darr. The Thundercats join Dr. Dometone and his frog-type robot Hercie to save the planet from total destruction.

The Astral Prison / Watch This Episode
Jaga is captured by Nemex, an evil being in the Astral world, and Lion-O tries to find a way to rescue him. Third Earth legend says that the only person who can transport anyone to the Astral world is the evil Nether-Witch. Little do the Thundercats know that Mumm-Ra and the Nether-Witch are one and the same. Mumm-Ra traps Lion-O in the Astral world and Lion-O sets out to save Jaga. While escaping the Astral prison, Lion-O and Jaga save an old sorcerer named Brodo who has been imprisoned in the Astral Prison for centuries. As a gesture of thanks, Brodo sends Lion-O back to his own dimension.

Monkian's Bargain / Watch This Episode
Monkian goes to Mumm-ra and agrees to give him anything if Mumm-ra will make him powerful enough to rule Third Earth. Mumm-ra agrees cleverly, and gives him Power Spheres which make him super strong and give him super weapons. He freezes all the Thundercats, then defeats Lion-O and takes the sword of Omens back to Mumm-ra. Mumm-ra takes it, and then says that Monkian's part of the bargain will be that he can keep the spheres, but he has to stay in Mumm-ra's pyramid for all eternity. Walls surround Monkian, and every time he breaks them down, a new set of walls shows up. While Monkian and Mumm-ra are arguing, Lion-O retrievs the sword and frees the other Thundercats. Monkian gives up his power to be free again.

Monkian's Bargain / Watch This Episode
The normally submissive Jackalman decides to start his own army in hopes of conquering Third Earth by himself. He does manage to give the Thundercats trouble, but soon he is defeated and ends up crawling back to the other mutants at Castle Plun-Darr, who weren't very happy that he rebelled in the first place.

Excalibur / Watch This Episode
The Ancient spirits of evil show Mumm-Ra the story of King Arthur, and explain to him that the strongest sword that ever existed was Excalibur, Arthur's weapon. Mumm-Ra disguises himself as Arthur, and returns to the lake where the sword is guarded by The Lady of the Lake. Fooled by his disguise, The Lady gives Mumm-Ra Excalibur. The disguised Mumm-Ra challenges Lion-O to a dual, and Lion-O foolishly accepts the challenge. The swords clash, and Excalibur is victorious. The eye of Thundera is split in two, and the Thundercats become powerless. Merlin, Arthur's teacher and a famous magician stops Mumm-Ra from destroying the Thundercats, and restores the eye to its original state.

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