ThunderCats follows the adventures of a group of cat-like humanoid aliens called Thunderians, from an alien planet called Thundera. The dying planet Thundera is meeting its end, forcing the ThunderCats to flee their homeworld. The fleet is attacked by the Thunderians’ enemies, the Mutants of Plun-Darr, who destroy most of the starships fleet, but spare the flagship, hoping to capture the legendary mystic Sword of Omens they believe is on board. The sword holds the Eye of Thundera, the source of the ThunderCats’s power, which is embedded in the hilt. Though the Mutants damage the flagship, the power of the Eye drives them back. The damage to the ship means the journey to their original destination is not possible, instead having to journey to “Third Earth;” which will take much longer than they had anticipated. The eldest of the ThunderCats, Jaga, volunteers to pilot the ship while the others sleep in capsules. He himself dies of old age in the process, but not before ensuring they will reach their destination safely. The flagship contains the young Lord of the ThunderCats, Lion-O, as well as the ThunderCats Cheetara, Panthro, Tygra, the “ThunderKittens” WilyKit and WilyKat, and a representative of the race of Snarfs.

When the ThunderCats awake from their suspended animation on Third Earth, Lion-O discovers that his suspension capsule has slowed rather than stopped his aging, and he is now a child in the body of an adult. Together, the ThunderCats and the friendly natives of Third Earth construct the “Cat’s Lair,” their new home and headquarters, but before long, the Mutants have tracked them down to Third Earth. The intrusion of these two alien races upon the world does not go unnoticed, however; the demonic, mummified sorcerer, Mumm-Ra, recruits the Mutants to aid him in his campaign to acquire the Eye of Thundera and destroy the ThunderCats so that his evil might continue to hold sway over Third Earth.

Production Company: Rankin/Bass
 Animated Entertainment
Launched: January 23, 1985 
Closed: September 29, 1989
Country of origin: United States
Episodes: 130
Seasons: 4
Running time: 22 minutes

Season one


Exodus

The Unholy Alliance

Berbils

The Slaves of Castle Plun-darr

Pumm-Ra

The Terror of Hammerhand

Trouble with Time

The Tower of Traps

The Garden of Delights

Mandora - The Evil Chaser

The Ghost Warrior

The Doom-Gaze

Lord of the Snows

The Spaceship Beneath the Sands

The Time Capsule

The Fireballs of Plun-Darr

All that Glitters

Spitting Image

Mongor

Return to Thundera

Dr. Dometone

The Astral Prison

The Crystal Queen

Safari Joe

Snarf Takes up the Challenge

Sixth Sense

The Thunder-Cutter

The Wolfrat

Feliner, Part 1

Feliner, Part 2

Mandora and the Pirates

Return of the Driller

Dimension Doom

Queen of 8 Legs

Sword in a Hole

The Evil Harp of Charr-Nin

Lion-O's Anointment First Day: Trial of Strength

The Demolisher

Monkian's Bargain

Tight Squeeze

The Micrits

Lion-O's Anointment Second Day: The Trial of Speed

The Rock Giant

Jackalman's Rebellion

Turmagar the Tuska

Lion-O's Anointment Third Day: Trial of Cunning

The Mumm-Ra Berbil

Mechanical Plague

Trapped

Lion-O's Anointment Fourth Day: The Trial of Mind Power

Excalibur

Secret of the Ice King

Good and Ugly

The Transfer

Divide and Conquer

Dream Master

Out of Sight

The Mountain

The Superpower Potion

Eye of the Beholder

Lion-O's Anointment Final Day: The Trial of Evil

The Trouble with ThunderKittens

Mumm-Rana

The Shifter

Fond Memories

Thunder, thunder
Thunder, Thundercats, ho

Thundercats
Are on the move
Thundercats are loose
Feel the magic
Hear the roar
Thundercats are loose

Thunder, thunder
Thunder, Thundercats
Thunder, thunder
Thunder, Thundercats
Thunder, thunder
Thunder, Thundercats
Thunder, thunder
Thunder, Thundercats

Thundercats