Ratar-O, the most powerful of all the Mutant Warlords, comes to Third Earth and takes control of the Mutants.

A damaged alien spaceship makes contact with Cheetara's Sixth Sense. The telepathic communication drains her...

The ThunderCats have almost completed their spacecraft, the Feliner, but can't make it fly because they lack a...

Infuriated by the Mutants' excuse that the Sword of Omens is invincible, Mumm-Ra summons Rachiman, a legendary...

The Mutants create Warbot, a Plun-Darrian war robot, to destroy Cats' Lair.

Tartana, the Crystal Queen, steals the Ariettabird and cages it in her Crystal Kingdom. The Ariettabird's...

Safari Joe, an intergalactic Big Game Hunter, arrive on Third Earth to hunt the ThunderCats.

Wilykat and Wilykit explore the Ruined Temple. They move a hexagonal rock and unwittingly free Mongor, the...

Jaga is captured by Nemex, the Astral Imprisoner and only Lion-O can save him.

While swimming, Wilykat is apparently devoured by an amphibious monster, which is actually a robot belonging...

Mumm-Ra transforms himself into a troll named Grygory Grygion and tricks Lion-O into attacking Tygra and...

Snarf searches the Cats' Lair and discovers all the ThunderCats have been captured by the Mutants.

The Mutants bombard the Warrior Maidens' Treetop Kingdom with liquid fireballs mechanically launched from...

Mumm-Ra raises the Mutants' buried spaceship from beneath the Desert Of Sinking Sands.

The ThunderCats track a falling Meteor of Thundrillium, their power source, to Hook Mountain, the icy...

Jaga tells the homesick Lion-O that the Time Capsule containing the history of ThunDERa is still intact...

While looking for valuables in an abandoned tomb, two Bolkins accidentally release a ghostly renegade named...

Mumm-Ra allies with the Egyptian princess Ta-She to gain the Doomgaze, an entrancing power which could enslave...

While investigating a series of earthquakes, Tygra falls into the earth and confronts a giant worm head in the...

The ThunderTank is given a trial run as the ThunderCats attempts to liberate the Brutemen from slavery.

From beyond any known galaxy, bring with them the laws and ideals of their doomed planet, Thundera, come the...

Mandora of the interplanetary Control Force enlists Lion-O and Snarf to pursue three criminals they...

Wilykit and Wilykat help a friendly Wollo who is being robbed by two gargoyle-like creatures. During the...

The Code Of Thundera is called into action as Lion-O saves a unicorn from the Berserkers and their leader,...

Searching for Thundrillium, the ThunderTank's power sources, Tygra is caught in the Cave of Time, aging him...

Mumm-Ra changes into a puma and stages a fake heroic deed in order to convince the ThunderCats that he's from...

The Mutants form an unholy alliance with Mumm-Ra and set forth to destroy the ThunderCats.