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The Best Episodes of ThunderCats

Every episode of ThunderCats ranked from best to worst. Let's dive into the Best Episodes of ThunderCats!

The Best Episodes of ThunderCats

The ThunderCats are on the move! After the kingdom of Thundera is attacked by the lizard people, Lion-O leads Tygra, Cheetara and the other heroes...
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Episode Rankings

  1. #1 Fan Favorite
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    ThunderCats Season 1 Episode 4 - Song of the Petalars
    8.1/10(216 votes)

    #1 - Song of the Petalars

    S1:E4

    While traveling through the woods, the ThunderCats come across a group of Petalars - small plant-like creatures whose lifespans are only one day. Lion-O befriends the young Emrick as he and the others try to figure out a way out of the woods and return the Petalars to their home. Meanwhile, Slithe and his lizard army are hot on the ThunderCats' trail to eliminate them.

    Directors:Yoshiharu Ashino, Sean Song
    Writer:Unknown

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  2. ThunderCats Season 1 Episode 2 - Omens (2)
    8.0/10(197 votes)

    #2 - Omens (2)

    S1:E2

    An unforeseen betrayal by a former comrade brings destruction upon the Cat Kingdom. While King Claudus leads the fight against General Slithe and his lizard army, the evil sorcerer Mumm-Ra attempts to seize the Sword of Omens.

    Directors:Sean Song, Yasuhiro Geshi, Rokou Ogiwara
    Writer:Unknown

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  3. ThunderCats Season 1 Episode 7 - Legacy
    8.0/10(160 votes)

    #3 - Legacy

    S1:E7

    Lion-O ventures into the Book of Omens where he becomes the incarnation of his renowned ancestor, the valiant Leo, who led the rebellion against Mumm-Ra in a previous millennium.

    Directors:Sean Song, Kazuyoshi Takeuchi
    Writer:Unknown

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  4. ThunderCats Season 1 Episode 8 - The Duelist and the Drifter
    8.0/10(166 votes)

    #4 - The Duelist and the Drifter

    S1:E8

    As Tygra and Panthro work on the ThunderTank, Lion-O is searching for supplies and encounters a mysterious Drifter who helps teach a few important lessons. After showing off The Sword of Omens in town, Lion-O is challenged by a man known as The Duelist and must overcome himself in order to win.

    Directors:Sean Song, Shingo Uchida
    Writer:Unknown

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  5. ThunderCats Season 1 Episode 13 - Between Brothers
    8.0/10(128 votes)

    #5 - Between Brothers

    S1:E13

    Tygra and Lion-O enter the Astral Plane to retrieve the stone, but encounter Mumm-Ra in the process. Grune and Panthro have their final duel. Cheetara finally chooses her beau.

    Director:Shingo Uchida
    Writer:Paul Giacoppo

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  6. ThunderCats Season 1 Episode 1 - Omens (1)
    7.9/10(241 votes)

    #6 - Omens (1)

    S1:E1

    Lion-O, always outdone by his adoptive older brother Tygra, undergoes the ritual to be chosen by the Sword of Omens as the next king of Thundera. His father, Claudus, does not feel his son is ready because he is too lenient and easily distracted by flights of fancy like the myth of ancient technology. Soon after, King Claudus welcomes the return of his friend Grune and holds a celebration in both his honor and in memory of the fallen Panthro. During the event, Lion-O defends a pair of captured Lizards and convinces his father to release them.

    Directors:Yoshiharu Ashino, Sean Song
    Writer:Unknown

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    The 20 WORST Episodes of ThunderCats

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  7. ThunderCats Season 1 Episode 6 - Journey to the Tower of Omens
    7.9/10(146 votes)

    #7 - Journey to the Tower of Omens

    S1:E6

    The ThunderCats continue their quest for the Book of Omens, which leads them to the fabled Tower of Omens. However, they will first have to get past a series of deadly traps in order to reach it. Meanwhile, Mumm-Ra grows tired of waiting and forces Jaga to reveal the Book's location, and plans to go there himself to take it at all costs.

    Directors:Sean Song, Kazuo Nogami
    Writer:Unknown

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  8. ThunderCats Season 1 Episode 12 - Into the Astral Plane
    7.9/10(117 votes)

    #8 - Into the Astral Plane

    S1:E12

    The Cats are ready to retrieve the stone from the "Astral Plane" in the Elephant Village, but find it overtaken by Grunea and Mumm-Ra's forces. Plus, Tygra and Cheetara's early relationship to one another is revealed.

    Director:Yoshiharu Ashino
    Writer:Unknown

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  9. ThunderCats Season 1 Episode 5 - Old Friends
    7.7/10(150 votes)

    #9 - Old Friends

    S1:E5

    The ThunderCats accompany Panthro to Cloud Peak Mine to search for Thundrilium for the Thundertank. Along the way, Panthro and Grune's past is explored, from their first encounter to the reason behind Grune's betrayal.

    Directors:Yoshiharu Ashino, Sean Song
    Writer:Unknown

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  10. ThunderCats Season 1 Episode 14 - New Alliances
    7.6/10(132 votes)

    #10 - New Alliances

    S1:E14

    The ThunderCats go on the offensive, but Mumm-Ra won't see his lizard army crushed so easily. He tasks Slithe with recruiting two new and vicious Generals.

    Director:Yoshiharu Ashino
    Writer:Unknown

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  11. ThunderCats Season 1 Episode 11 - The Forest of Magi Oar
    7.5/10(122 votes)

    #11 - The Forest of Magi Oar

    S1:E11

    Sent by the Elephants to the Forest of Magi Oar, Lion-O must learn to master Sight Beyond Sight before returning to the Elephant Village. The Cats encounter a group of paper warriors with a dark secret.

    Director:Tomoya Takahashi
    Writer:Unknown

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  12. ThunderCats Season 1 Episode 9 - Berbils
    7.0/10(130 votes)

    #12 - Berbils

    S1:E9

    The ThunderCats meet the mysterious beings who had helped them during the night and they turn out to be the Berbils, or Ro-Bears. The Berbils treat the ThunderCats with great hospitality until the village is attacked and some of the Berbils are captured. The ThunderCats help their new friends and a battle for freedom ensues.

    Directors:Sean Song, Yasuhiro Geshi, Takahiro Tanaka
    Writer:Unknown

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  13. ThunderCats Season 1 Episode 10 - Sight Beyond Sight
    7.0/10(122 votes)

    #13 - Sight Beyond Sight

    S1:E10

    The Cats track the location of the first stone to the mystical Elephant Village, but Lion-O can't find the specific location and the forgetful Elephants no longer remember where it is.

    Director:Yoshiharu Ashino
    Writer:Unknown

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  14. ThunderCats Season 1 Episode 3 - Ramlak Rising
    6.8/10(175 votes)

    #14 - Ramlak Rising

    S1:E3

    After escaping their destroyed city with the Sword of Omens, the team encounters the Fishmen, who sail the quicksand sea in search of a massive sea creature. The ThunderCats’ quest is to find the Book of Omens … but Lion-O is more interested in revenge on Mumm-Ra.

    Directors:Yoshiharu Ashino, Sean Song
    Writer:Unknown

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  15. ThunderCats Season 1 Episode 17 - Native Son
    6.1/10(103 votes)

    #15 - Native Son

    S1:E17

    While traveling through snowy mountains in search of safe passage, Tygra and Lion-O come upon a lost tiger village and in it they find Tygra's real father. Tygra learns why his father sent him away as a baby — to save his life. But all is not as it seems in this village as the brothers learn these tigers are cursed and Tygra may be the answer to saving them — but at the cost of his own life.

    Director:Mitsuo Kusakabe
    Writer:Unknown

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  16. ThunderCats Season 1 Episode 15 - The Trials of Lion-O (1)
    6.0/10(110 votes)

    #16 - The Trials of Lion-O (1)

    S1:E15

    During an ambush, Lion-O falls to his death, but he is given a second chance at life - if he can pass a series of trials that pit him against each of his teammates.

    Director:Yoshiharu Ashino
    Writer:Unknown

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  17. ThunderCats Season 1 Episode 16 - The Trials of Lion-O (2)
    5.9/10(107 votes)

    #17 - The Trials of Lion-O (2)

    S1:E16

    Pleading for a chance to save his friends, Jaga grants Lion-O life until sunrise to try and save his friends ... and stop Mumm-Ra.

    Director:Yutaka Kagawa
    Writer:Unknown

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  18. ThunderCats Season 1 Episode 18 - Survival of the Fittest
    5.8/10(98 votes)

    #18 - Survival of the Fittest

    S1:E18

    While Lion-O and Tygra were off with the tiger clan adventure, the rest of the crew is keeping an eye on the Thundertank. The twins are looking for some stashed food, but it appears Snarf beat them to the goodies. Panthro and Cheetara decide to use this as an opportunity to teach these two how to survive on their own.

    Director:Riki Matsuura
    Writer:Unknown

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  19. ThunderCats Season 1 Episode 20 - Curse of Ratilla
    5.8/10(125 votes)

    #19 - Curse of Ratilla

    S1:E20

    Arriving at Mount Plun-Darr, the ThunderCats and Pumyra discover that the Thunderian slaves are being forced to excavate the Sword of Plun-Darr for Ratar-O and his Rats.

    Director:Tomoya Takahashi
    Writer:Unknown

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  20. ThunderCats Season 1 Episode 21 - Birth of the Blades
    5.7/10(126 votes)

    #20 - Birth of the Blades

    S1:E21

    Mumm-Ra arrives at Mount Plun-Darr and battles the Thundercats in an attempt to regain the Sword of Plun-Darr.

    Director:Masayuki Kato
    Writer:Unknown

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  21. ThunderCats Season 1 Episode 19 - The Pit
    5.6/10(130 votes)

    #21 - The Pit

    S1:E19

    The Thundercats discover a cat refugee, Pumyra, being forced to fight as a gladiator in a city of Dogs.

    Director:Mitsuo Kusakabe
    Writer:Unknown

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  22. ThunderCats Season 1 Episode 23 - Recipe for Disaster
    5.5/10(123 votes)

    #22 - Recipe for Disaster

    S1:E23

    The Thundercats require the assistance of a snake oil salesman named Ponzie to defeat Mumm-ra’s latest monstrous form.

    Director:Riki Matsuura
    Writer:Unknown

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  23. ThunderCats Season 1 Episode 24 - The Soul Sever
    5.5/10(94 votes)

    #23 - The Soul Sever

    S1:E24

    While trying to uncover the location of the next stone, the ThunderCats cross paths with a mad man, Soul Sever, who is trying to insert the souls of his long-lost family into machines.

    Director:Kenichi Maejima
    Writer:Unknown

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  24. ThunderCats Season 1 Episode 25 - What Lies Above (1)
    5.4/10(125 votes)

    #24 - What Lies Above (1)

    S1:E25

    The ThunderCats' search for the Tech Stone leads them high above Thundera to the floating bird city of Avista, where the stone is the power source for their city.

    Director:Shinichi Matsumi
    Writer:Unknown

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  25. ThunderCats Season 1 Episode 26 - What Lies Above (2)
    5.4/10(122 votes)

    #25 - What Lies Above (2)

    S1:E26

    In the season finale, Mumm-Ra's forces find the ThunderCats and the Tech Stone in Avista City. An incredible battle ensues for the stone as Lion-O finds himself betrayed by a trusted ally.

    Director:Shinichi Matsumi
    Writer:Unknown

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Best Episodes Summary

"Song of the Petalars" is the best rated episode of "ThunderCats". It scored 8.1/10 based on 216 votes. Directed by Yoshiharu Ashino, Sean Song and written by Unknown, it aired on 8/12/2011. This episode scored 0.1 points higher than the second highest rated, "Omens (2)".