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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 Thunderans

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  1. #1 Worst Episode
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    ThunderCats Season 1 Episode 51 - Excalibur
    6.0/10(1 votes)

    #1 - Excalibur

    S1:E51

    The story of Excalibur, the greatest sword in history, is revealed to Mumm-Ra, who is then determined to find the Excalibur and defeat Lion-O and the Sword of Omens.

    Director:Unknown
    Writer:Peter Lawrence

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  2. ThunderCats Season 1 Episode 52 - Secret of the Ice King
    6.0/10(1 votes)

    #2 - Secret of the Ice King

    S1:E52

    A giant Ice King is accidentally released from his glacial prison and attacks the Castle of the Snowmen.

    Director:Unknown
    Writer:Bob Haney

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  3. ThunderCats Season 1 Episode 53 - Good and Ugly
    6.0/10(1 votes)

    #3 - Good and Ugly

    S1:E53

    A Terator Starship, an extremely ugly spaceship, is pursued by a Kymera Craft, a visually appealing spaceship. The Terator Spaceship escapes and lands at the Cats' Lair

    Director:Unknown
    Writer:Peter Lawrence

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  4. ThunderCats Season 1 Episode 54 - The Transfer
    6.0/10(1 votes)

    #4 - The Transfer

    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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  5. ThunderCats Season 1 Episode 55 - Divide and Conquer
    6.0/10(1 votes)

    #5 - Divide and Conquer

    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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  6. ThunderCats Season 1 Episode 56 - Dream Master
    6.0/10(1 votes)

    #6 - Dream Master

    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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  7. ThunderCats Season 1 Episode 57 - Out of Sight
    6.0/10(1 votes)

    #7 - Out of Sight

    S1:E57

    Willa is practicing her long-bow skills when a warning device alerts her to a Mutant attack. Willa is captured and the ThunderCats rush to rescue her.

    Director:Unknown
    Writer:Chris Trengove

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  8. ThunderCats Season 1 Episode 58 - The Mountain
    6.0/10(1 votes)

    #8 - The Mountain

    S1:E58

    Mumm-Ra summons the Mutants and threatens to banish them from Third Earth unless they bring him the Sword of Omens.

    Director:Unknown
    Writer:Danny Peary

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  9. ThunderCats Season 1 Episode 61 - Lion-O's Anointment Final Day: The Trial of Evil
    6.0/10(1 votes)

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

    S1:E61

    The concluding trial in Lion-O's Anointment Trials pits him alone and weaponless against the evil Mumm-Ra.

    Director:Unknown
    Writer:Leonard Starr

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  10. ThunderCats Season 1 Episode 62 - The Trouble with ThunderKittens
    6.0/10(1 votes)

    #10 - The Trouble with ThunderKittens

    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
    6.0/10(1 votes)

    #11 - Mumm-Rana

    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
    6.0/10(1 votes)

    #12 - The Shifter

    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 1 Episode 3 - Berbils
    6.8/10(318 votes)

    #13 - Berbils

    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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  14. ThunderCats Season 2 Episode 18 - The Sound Stones
    6.9/10(176 votes)

    #14 - The Sound Stones

    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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  15. ThunderCats Season 1 Episode 6 - The Terror of Hammerhand
    7.0/10(277 votes)

    #15 - The Terror of Hammerhand

    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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  16. ThunderCats Season 1 Episode 36 - The Evil Harp of Charr-Nin
    7.0/10(207 votes)

    #16 - The Evil Harp of Charr-Nin

    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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  17. ThunderCats Season 3 Episode 14 - Locket of Lies
    7.0/10(181 votes)

    #17 - Locket of Lies

    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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  18. ThunderCats Season 1 Episode 38 - The Demolisher
    7.1/10(211 votes)

    #18 - The Demolisher

    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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  19. ThunderCats Season 2 Episode 20 - Sideswipe
    7.1/10(182 votes)

    #19 - Sideswipe

    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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  20. ThunderCats Season 1 Episode 4 - The Slaves of Castle Plun-Darr
    7.2/10(299 votes)

    #20 - The Slaves of Castle Plun-Darr

    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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  21. ThunderCats Season 1 Episode 44 - Jackalman's Rebellion
    7.2/10(220 votes)

    #21 - Jackalman's Rebellion

    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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  22. ThunderCats Season 1 Episode 49 - Trapped
    7.2/10(201 votes)

    #22 - Trapped

    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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  23. ThunderCats Season 1 Episode 2 - The Unholy Alliance
    7.3/10(349 votes)

    #23 - The Unholy Alliance

    S1:E2

    The Mutants, who have also reached Third Earth, encounter an old pyramid. It turns out to be the home of Mumm-Ra the Ever-Living, and they join forces to capture the Sword of Omens. Both the Mutants and Mumm-Ra attempt to attack Lion-O to possess the Sword, but miserably fail.

    Director:Unknown
    Writer:Leonard Starr

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  24. ThunderCats Season 1 Episode 15 - The Time Capsule
    7.3/10(239 votes)

    #24 - The Time Capsule

    S1:E15

    Lion-O becomes homesick, and his memories of Thundera are almost nonexistent. Jaga appears to Lion-O and tells him that on their spaceship, they brought with them a time capsule which contained a recording of Thundera and its history up to the time it was destroyed. The Thundercats set out to search for their time capsule.

    Director:Unknown
    Writer:Peter Lawrence

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  25. ThunderCats Season 1 Episode 21 - Dr. Dometone
    7.3/10(221 votes)

    #25 - Dr. Dometone

    S1:E21

    An old scientist seeks the Thundercats to help him save the oceans of Third Earth. Long ago, a crack was made in the bottom of the ocean which caused the water to drain into the earth's core. Dr. Dometone created a plug which sealed the hole in the ocean, and saved Third Earth from destruction. Now, an evil miner, Scrape, has come to remove the plug and mine the rock that is found on the bottom of the ocean. The Thundercats join Dr. Dometone and his frog-like robot, Herkie, to save the planet from total destruction.

    Director:Unknown
    Writer:William Overgard

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Worst Episodes Summary

"Excalibur" is the worst rated episode of "ThunderCats". It scored 6/10 based on 1 votes. Directed by Unknown and written by Peter Lawrence, it aired on 12/2/1985. This episode scored 0.0 points lower than the second lowest rated, "Secret of the Ice King".