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Thundercats Season 4 Episodes
Season 4 Episode Guide
20 Episodes 1989 - 1989
Episode 1
Return to Thundera!: Part I
Mon, Sep 4, 1989
The Thundercats depart Third Earth for New Thundera, leaving Tygra and Pumyra behind to watch over the Cat's Lair and Tower of Omens. Meanwhile, the Ancient Spirits of Evil resurrect Mumm-ra, building a new pyramid on New Thundera.
Episode 2
Return to Thundera!: Part II
Tue, Sep 5, 198922 mins
More and more earthquakes are occurring on New Thundera thanks to Mumm-Ra's sabotage of an arcane machine that lies at the center of the planet that holds its gravity together, watched over by the ancient Thunderian sorceress, Jagara.
Episode 3
Return to Thundera!: Part III
Wed, Sep 6, 198922 mins
Mumm-Ra sends Ma-Mutt disguised as Mandora to free the Mutants from the Circus Train. The Mutants are then ordered to get rid of Tygra and Pumyra back on Third Earth.
Episode 4
Return to Thundera!: Part IV
Thu, Sep 7, 198921 mins
Mumm-Ra sends Ma-Mutt, disguised as Mandora, to free the Mutants from the Circus Train. He then sends them to Third-Earth to eliminate Tygra and Pumyra.
Episode 5
Return to Thundera!: Part V
Fri, Sep 8, 198922 mins
Mumm-Ra again seriously threatens to destroy the Gyroscope and thereby the newly reformed New Thundera. Jaga helps Lion-O think of a solution once and for all.
Episode 6
Leah
Mon, Sep 11, 198923 mins
The Ancient Spirits of Evil bring a creature to Mumm-Ra called a Mirror Wraith, which he transforms as a doll and gives to a lost thunderian child named Leah, who keeps it and unwittingly puts the Thundercats in great danger.
Episode 7
Frogman
Tue, Sep 12, 198923 mins
Wilykit and Wilykat accidentally release Frogman. Seemingly harmless at first, he is soon revealed as a ruthless villain with the fearsome power to control all water.
Episode 8
The Heritage
Wed, Sep 13, 198923 mins
While exploring New Thundera, Wilykit and Wilykat stumble upon a mysterious orb of gold and pick it up, believing it to be one of the Treasures of Thundera. However, it soon transpires that that is not the case.
Episode 9
Screwloose
Thu, Sep 14, 198923 mins
Jagara cannot work the new Gyroscope alone, so the Thundercats send for someone to aid her. Screwloose, a robot who specializes in the technology, comes to Third Earth. But, Mumm-Ra tampers with his programming, making him destructive.
Episode 10
Malcar
Fri, Sep 15, 198923 mins
Mumm-Ra resurrects the ancient alchemist Malcar, but he returns old and weak. Mumm-Ra then sends him to the Canyons of Youth, which will restore his youth and power so that he may effectively defeat the Thundercats.
Episode 11
Helpless Laughter
Mon, Sep 18, 198923 mins
Panthro, Snarf, and later even Mumm-Ra fall prey to the waters of the Swamp of the Laughing Lillypads-which unless cured, will cause them to laugh until they die.
Episode 12
Cracker's Revenge
Tue, Sep 19, 198923 mins
The twisted robo-pirate Captain Cracker frees the Lunataks from the Circus Train and they all plot to assault Third Earth, since most of the Thundercats are on New Thundera.
Episode 13
The Mossland Monster
Wed, Sep 20, 198923 mins
While on a solo trip to New Thndera, Tygra crash lands in an unexplored region of the planet's moss-land. There he is captured by a mysterious and mighty gigantic swamp beast.
Episode 14
Ma-Mutt's Confusion
Thu, Sep 21, 198923 mins
Mumm-Ra has a powerful device called the Babylonian Babarian Boiler, that he plans to use against the Thundercats. However, the bumbling Ma-Mutt accidentally destroys the machine, causing an enraged Mumm-Ra to banish him from the pyramid.
Episode 15
Shadowmaster
Fri, Sep 22, 198923 mins
The Ancient Spirits of Evil unleash the Shadowmaster, a dark sorcerer who may be even more powerful than Mumm-Ra. Fearing the Sprits will favour the Shadowmaster over him, Mumm-Ra hatches a secret plot to aid his enemies the Thundercats.
Episode 16
Swan Song
Mon, Sep 25, 198923 mins
An ecology inspector comes to New Thundera to inspect the new Cat's Lair. His ship uses the Space Way Airborn Navigation system to direct him to planets throughout the universe. Upon arriving he is ambushed by Two-Time, who steals the ship.
Episode 17
Touch of Amortus
Tue, Sep 26, 198923 mins
Mumm-Ra reluctantly summons up the treacherous tentacled demon Amortus, who has the formidable ability to turn all living things into stone.
Episode 18
The Zaxx Factor
Wed, Sep 27, 198923 mins
Vultureman escapes the Circus Train by hijacking a bookmobile. He discovers information about a powerful enemy of Mumm-Ra, Zaxx. Using this knowledge, Vultureman plots to overthrow Mumm-Ra and rule the universe.
Episode 19
Well of Doubt
Thu, Sep 28, 198923 mins
Lion-O unwittingly drinks tainted water from the devastating Well of Doubt, which causes him to lose all his courage and self belief.
Episode 20
The Book of Omens
Fri, Sep 29, 198923 mins
The key to the Book of Omens is finally solved and it is unlocked. All of the team must pass different tests to save the planet, and Lion-O faces many trials within the book to prove himself once and for all as Lord of the Thundercats.