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TV-Y7
S1 • E1
Wise Jaga leads a group of nobles, the Thundercats, as they escape their home planet of THUNDERA with direction to the Third Earth of a small solar system.
S1 • E2
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.
S1 • E3
The story about how Thundercats and Berbils become allies and friends; their first adventure together.
S1 • E4
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.
S1 • E5
Mumm-Ra takes the guise of Pumm-Ra, a Thunderian, to infiltrate and sabotage Cat's Lair.
S1 • E6
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.
S1 • E7
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.
S1 • E8
Lion-O and Wilykit must rescue Wilykit from the ultimate fortress.
S1 • E9
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.
S1 • E10
Lion-O helps Mandora, an interstellar police officer, retrieve three of the worst criminals in the galaxy after he accidentally releases them.
S1 • E11
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.
S1 • E12
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.
S1 • E13
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.
S1 • E14
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.
S1 • E15
The Thundercats search desperately for a precious device which has all the recorded history of Thundera up until the time of its destruction.
S1 • E16
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.
S1 • E17
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.
S1 • E18
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.
S1 • E19
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.
S1 • E20
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.
S1 • E21
The Thundercats help an undersea professor to protect a machine that prevents the oceans of Third Earth from literally going down the drain.
S1 • E22
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.
S1 • E23
Lion-O must brave an ice palace to save a sacred bird from a cruel and greedy queen's clutches.
S1 • E24
The Thundercats must match wits with Safari Joe:the most successful big-game hunter in the galaxy.
S1 • E25
When Mumm-Ra's latest evil scheme succeeds and every single Thundercat is captured, only Snarf is left to save the day.
S1 • E26
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.
S1 • E27
Mumm-Ra tricks Hachiman, a mighty samurai from a distant planet into believing the Thundercats are evil invaders. Hachiman sets out to destroy them.
S1 • E28
Vultureman builds a deceptively diminutive infiltration robot and Mumm-Ra arms it with miniaturization gas which shrinks the Thundercats down to size.
S1 • E29
Vultureman summons Rataro and his battleship who kidnaps Snarf's nephew to use as bait to trap the Thundercats.
S1 • E30
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.
S1 • E31
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.
S1 • E32
It's a race against time when Mumm-Ra orders Driller to bore a tunnel from an acid lake to the Cat's Lair.
S1 • E33
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.
S1 • E34
Mumm-Ra uses the birth of a powerful spider-queen to his advantage by luring the Thundercats into her deadly web.
S1 • E35
An S.O.S. from deep space turns out to be a trap set by Captain Shiner, a space mercenary working for Mumm-Ra.
S1 • E36
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.
S1 • E37
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.
S1 • E38
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.
S1 • E39
Monkian goes to Mumm-Ra's pyramid and agrees to give anything if Mumm-Ra will make him powerful enough to defeat the Thundercats.
S1 • E40
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.
S1 • E41
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.
S1 • E42
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.
S1 • E43
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.
S1 • E44
The normally submissive Jackalman decides to start his own army in the hopes of conquering Third-Earth himself.
S1 • E45
The Thundercats are asked to help the Tuska defend them from the Technopede, an evil robot that is devastating their homeland.
S1 • E46
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.
S1 • E47
Mumm-Ra disguises himself as an injured Ro-Bear Berbil to infiltrate Cats Lair.
S1 • E48
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.
S1 • E49
When a big storm hits Third-Earth, Wilykit and Wilykat are trapped in an old space capsule.
S1 • E50
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.
S1 • E51
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.
S1 • E52
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.
S1 • E53
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.
S1 • E54
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.
S1 • E55
Vultureman invents a voice imitator that the Mutants use to deceive, drive apart, and almost conquer the Thundercats.
S1 • E56
Mumm-Ra transforms into the Dream master to invade the dreams and control the minds of the Thundercats.
S1 • E57
Due to a malfunction with his invisibility whip while rescuing a warrior maiden from the Mutants, Tygra is stuck invisible and needs help fast.
S1 • E58
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.
S1 • E59
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.
S1 • E60
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.
S1 • E61
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.
S1 • E62
Yearning for more respect by the older Thundercats, Wilykit and Wilykat borrow their weapons for practice, only to have them stolen by the Mutants.
S1 • E63
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.
S1 • E64
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.
S1 • E65
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.
Snarf
Lion-O
Mumm-Ra
Cheetara
Panthro
Tygra
Pumyra
Alluro
Jackalman