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The Worst Episodes of ThunderCats

Every episode of ThunderCats ranked from worst to best. Explore the Worst Episodes of ThunderCats!

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The inhabitants of the planet Thundera evacuate just before it is destroyed. They were pursued by a band of mutants. All but one of their escape ships was destroyed. Only a small group of Thunderians

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  1. #1 Worst Episode
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    ThunderCats Season 1 Episode 3 - Berbils
    6.8/10(332 votes)

    S1:E3

    The Ro-Bear Berbils are a friendly group of robot bears that live on Third Earth. Lion-O and Snarf don't know this, and end up getting caught in a Ro-Bear trap. The Berbils free them however, and they form an alliance. Mumm-ra attacks the Berbil village, but the Thundercats save it. In return, the Ro-Bears help the Thundercats to build Cats' Lair, a new base for the Thundercats.

    Director:Unknown
    Writer:Leonard Starr

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  2. ThunderCats Season 1 Episode 6 - The Terror of Hammerhand
    7.0/10(286 votes)

    S1:E6

    When Snarf and a young unicorn are captured by the pirate Hammerhand and his crew of Berserkers, Lion-O goes to rescue them.

    Director:Unknown
    Writers:Ron Goulart, Jules Bass

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  3. ThunderCats Season 1 Episode 36 - The Evil Harp of Charr-Nin
    7.0/10(216 votes)

    S1:E36

    Wilykit and Kat find an ancient harp that has a genie in it. His name is Charr-Nin. Mumm-Ra appears to the genie and tells him that if he destroys the Thundercats, he will be freed from his eternal prison in the harp. Foolishly, Char-Nin agrees, and begins trapping the Thundercats in his harp one by one. Mumm-Ra's plan works, and he betrays Charr-Nin. During their arguing, the Thundercats manage to escape, leaving Mumm-Ra and Charr-Nin battling beneath the earth.

    Director:Unknown
    Writers:Denis Markell, Doug Bernstein

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  4. ThunderCats Season 2 Episode 18 - The Sound Stones
    7.0/10(185 votes)

    S2:E18

    Vultureman builds a sonic gun from a sound stone he stole in Dark Side as the Lunatacs join with him to attack the Tower of Omens.

    Director:Unknown
    Writer:J. Larry Carroll

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  5. ThunderCats Season 3 Episode 14 - Locket of Lies
    7.0/10(188 votes)

    S3:E14

    On Thundera, Mumm-Ra creates the Locket of Lies and has Mu-Mutt plant it in the Valley of the Snarfs. Eggbert and Oswald Snarf find the locket and contact the Thundercats about it. When communications break up, the Thundercats (Lion-O, Cheetara, Panthro, Tygra) go to Thundera to see the Locket. When they arrive, the Locket leads them to a place in front of an old building. But the ground they are standing on gives way and they are trapped in a well. Mumm-Ra shows up and tells them not to try to escape, but the Thundercats try anyway. The walls start closing on them, and all their efforts to stop the walls fail. Finally, Lion-O uses the Eye of Thundera and the Cat Signal to push through the wall, and they all escape

    Director:Unknown
    Writer:Bill Ratter

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  6. ThunderCats Season 1 Episode 38 - The Demolisher
    7.1/10(218 votes)

    S1:E38

    A vagabond space traveler lands on Third Earth to challenge Mumm-Ra to a fight. The Demolisher is victorious against Mumm-Ra and sends him running back to his tomb. Mumm-Ra acknowledges the power of the Demolisher, and convinces him to seek and destroy Lion-O. The Demolisher, searching for another fight, gladly accepts Mumm-Ra's advice. He battles with Lion-O only to face defeat.

    Director:Unknown
    Writers:Bob Haney, Peter Lawrence

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  7. ThunderCats Season 1 Episode 49 - Trapped
    7.1/10(207 votes)

    S1:E49

    When a big storm hits Third Earth, the Thunderkittens are trapped in an old space capsule. Meanwhile, Tygra and Cheetra almost crash the Feliner, but Lion-O guides them in for a safe landing with the eye of Thundera. The kittens are captured by Mumm-ra, but end up saving the day by showing him his reflection in the window of the capsule.

    Director:Unknown
    Writer:Steve Perry

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  8. ThunderCats Season 1 Episode 54 - The Transfer
    7.1/10(204 votes)

    S1:E54

    A spaceship freighted with a lethal radioactive sphere is on a collision course for Third Earth.

    Director:Unknown
    Writers:Lee Schneider, Lawrence DuKore

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  9. ThunderCats Season 1 Episode 56 - Dream Master
    7.1/10(209 votes)

    S1:E56

    Mumm-Ra transforms into Mumm-Ra the Dream Master and summons spectral Dream Selves from the sleeping Panthro, Cheetara, Tygra, Wilykat, and Wilykit.

    Director:Unknown
    Writers:Heather M. Winters, Annabelle Gurwitch

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  10. ThunderCats Season 1 Episode 62 - The Trouble with ThunderKittens
    7.1/10(204 votes)

    S1:E62

    To prove themselves worthy of being ThunderCats, the ThunderKittens borrow the other ThunderCats' weapons and practice with them. They are ambushed by Mutants, who take their weapons.

    Director:Unknown
    Writer:Kimberly Morris

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  11. ThunderCats Season 1 Episode 63 - Mumm-Rana
    7.1/10(206 votes)

    S1:E63

    The Feliner is attacked by the RatStar, manned by the Mutants. Jackalman, Monikan, and S-S-Slithe are ejected and saved by Mumm-Rana, a female mirror image of Mumm-Ra, who is a force for good.

    Director:Unknown
    Writer:Bob Haney

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  12. ThunderCats Season 1 Episode 64 - The Shifter
    7.1/10(201 votes)

    S1:E64

    Vultureman invents the Shifter, a device that can switch personalities, and uses it on Panthro's personality and Snarf's body.

    Director:Unknown
    Writer:Matthew Malach

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  13. ThunderCats Season 2 Episode 15 - Together We Stand
    7.1/10(187 votes)

    S2:E15

    Mumm-Ra coats the Bezerker's weapons and armor with Thundranium. Wilykit and Wilykat find that guarding Cats' Lair is not always a breeze.

    Director:Unknown
    Writer:Herb Engelhardt

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  14. ThunderCats Season 4 Episode 8 - The Heritage
    7.1/10(193 votes)

    S4:E8

    Wily Kit and Kat, exploring New Thundera, stumble upon an Orb of Gold, and pick it up thinking that it is apart of their Heritage. Possessed by the power of the Golden Sphere of City, the ThunderKittens get greedy, and let the power of the orb overcome them. Mumm-Ra manages to get a hold of the orb, and his powers get four times more powerful. He gets so powerful, he destroys the Sword of Omens. Jar, the scrap metal collector reforges it for Lion-O. He gets so powerful that he challenges the power of the ancient spirits of evil. They lock him out of his pyramid until he surrenders the Orb to them. The spirits of evil let him back in, but destroy the Golden Sphere of City.

    Director:Unknown
    Writers:Peter Lawrence, Bill Ratter

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  15. ThunderCats Season 4 Episode 16 - Swan Song
    7.1/10(199 votes)

    S4:E16

    An Ecology Inspector (EI) comes to Thundera to inspect the new Cats Lair. His ship uses the SWAN system (Space Way Airborn Navigations) to direct him to planets all over the universe. When he arrives on Thundera, he gets ambushed by Two-Time (see Return to Thundera, Part III). Two-Time uses a hologram to make the EI's ship crash into a mountain, and then when the Thundercats come to rescue the EI in the Feliner, Two-Time uses the hologram again. Lion-O manages to fly around the mountain and lands the Feliner. Meanwhile, Two-Time flies to new Cats Lair in his spaceship, Dome-Down. He actually picks up the whole Lair and keeps it inside Dome-Down. The Thundercats fix the Feliner, rescue the EI, and then fly to catch Dome-Down. Once they catch the spaceship, Lion-O uses the sword to defeat Two-Time and send him flying out of the ship. Then they return Cats Lair to its proper place.

    Director:Unknown
    Writer:William Overgard

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  16. ThunderCats Season 1 Episode 4 - The Slaves of Castle Plun-Darr
    7.2/10(307 votes)

    S1:E4

    The homeless Mutants also make plans to build their home. They enslave a primitive race of beings called Brute-Men to do their work for them. The Thundercats go to Castle Plunn-Darr to free the Brute-Men from the Mutants.

    Director:Unknown
    Writer:Leonard Starr

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  17. ThunderCats Season 1 Episode 28 - The Wolfrat
    7.2/10(223 votes)

    S1:E28

    Mumm-Ra has a phial of miniaturization gas. Vultureman builds a mechanical Wolfrat to infiltrate the gas into the Cats' Lair. The ThunderCats are immediately reduced to nine inches high. Knowing how vulnerable the ThunderCats are in this state, Mumm-Ra orchestrates a mutant attack on the Cats' Lair. The ThunderCats' only hope is Snarf; they armor Snarf and use him as a battle charger while Tygra works on an antidote. The ThunderCats finally take the antidote, and Snarf, getting an accidental whiff of it, grows to huge proportions. In his gigantic state, Snarf terrifies the mutants and puts them to flight.

    Director:Unknown
    Writer:Chris Trengove

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  18. ThunderCats Season 1 Episode 31 - Mandora and the Pirates
    7.2/10(216 votes)

    S1:E31

    Mandora, on space-patrol, encounters an old pirate ship which doesn't meet inter-galactic standards. She boards the ship, arrests the pirate, and sends the ship to a space prison. Little does she know that she has boarded the Jolly Roger, the home of the evil Captain Cracker. Mandora is captured by the creature. Lion-O intercepts one of her distress calls, and must go into space to save her—easier said than done, as Cracker orchestrates a prison break.

    Director:Unknown
    Writer:William Overgard

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  19. ThunderCats Season 1 Episode 34 - Queen of 8 Legs
    7.2/10(215 votes)

    S1:E34

    Mumm-Ra finds out that the Kingdom of Webs has a new Queen, Spidera. Mumm-Ra thinks he can lure Lion-O into her lair. He transforms into a diamond fairy and casts a spell on Lion-O. Snarf follows them and gets trapped in the Kingdom of Webs. Lion-O tries to save him but ends up having to call the other Thundercats. Eventually they confront and beat Spidera.

    Director:Unknown
    Writer:Steve Perry

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  20. ThunderCats Season 1 Episode 44 - Jackalman's Rebellion
    7.2/10(228 votes)

    S1:E44

    The normally submissive JackalMan decides to start his own army in hopes of conquering Third Earth by himself. He does manage to give the Thundercats trouble, but soon he is defeated and ends up crawling back to the other mutants at Castle Plundarr, who weren't very happy that he rebelled in the first place.

    Director:Unknown
    Writer:Bruce W. Smith

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  21. ThunderCats Season 1 Episode 55 - Divide and Conquer
    7.2/10(207 votes)

    S1:E55

    Vultureman invents a voice imitator that imitates the ThunderCats' voices. He uses it to lure the ThunderCats into perilous situations.

    Director:Unknown
    Writer:Lee Schneider

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  22. ThunderCats Season 2 Episode 10 - Mumm-Ra Lives (5)
    7.2/10(183 votes)

    S2:E10

    The ThunderCats look for Sky Tomb to free the slaves imprisoned inside it. Bengali must learn the importance of teamwork as Lion-O leaves him with guard duty. Lynx-O and Cheetara run reconnaissance to find out if Mumm-Ra is truly back or not.

    Director:Unknown
    Writer:Leonard Starr

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  23. ThunderCats Season 2 Episode 11 - Catfight
    7.2/10(183 votes)

    S2:E11

    By disguising himself as Jaga, Mumm-Ra tricks Lion-O into believing the new ThunderCats are traitors so that they will fight amongst themselves.

    Director:Unknown
    Writer:Chris Trengove

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  24. ThunderCats Season 2 Episode 20 - Sideswipe
    7.2/10(189 votes)

    S2:E20

    Chilla freezes Snarfer's spaceship as he heads back to the Tower of Omens with Berbil Mexican takeout. When Mandora gets involved, Chilla freezes her and becomes a fugitive from the law as Mandora sets her sights on bringing her in.

    Director:Unknown
    Writer:William Overgard

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  25. ThunderCats Season 4 Episode 6 - Leah
    7.2/10(206 votes)

    S4:E6

    The Ancient Spirits of Evil bring the Mirror Wraith to Mumm-Ra, and he disguises it as a child's toy. Mumm-Ra then intercepts a thunderian escape pod which carries in it a little girl. He gives the toy to the child (Leah), and leaves. She is rescued by the Thundercats, and goes into New Cat's Lair with the doll. The doll turns into the Mirror Wraith when left alone, and begins to destroy Cat's Lair, and the Thundercats have no clue where the evil Mirror Wraith came from.

    Director:Unknown
    Writers:J. Larry Carroll, David Bennett Carren

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Worst Episodes Summary

"Berbils" is the worst rated episode of "ThunderCats". It scored 6.8/10 based on 332 votes. Directed by Unknown and written by Leonard Starr, it aired on 9/11/1985. This episode scored 0.2 points lower than the second lowest rated, "The Terror of Hammerhand".