Season 01
Season 02
Season 03
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.
All Episodes - S01
EPS01
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. Written by Jesse Sanchez
EPS02
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.
EPS03
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. Written by Jesse Sanchez
EPS04
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.
EPS07
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.
EPS09
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.
EPS11
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.
EPS13
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.
EPS14
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.
EPS16
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.
EPS17
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.
EPS18
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.
EPS20
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.
EPS37
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.
EPS40
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.
EPS41
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.
EPS42
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.
EPS46
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. Written by Jesse Sanchez
EPS48
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.
EPS50
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.
EPS51
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. Written by Jesse Sanchez
EPS54
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.
EPS61
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.
EPS63
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.
EPS65
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.