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Series Overview

Color Season Episodes Toonami Premiere Toonami Finale
1 26 October 6, 2012 April 6, 2013
Special 01 Unaired

Season 1 (2011-2012)

#

Episode Title

Directors

Writers

Original Airdate

Toonami Airdate

1 "Omens, Part 1" Yoshiharu Ashino
Sean Song
Michael Jelenic July 29, 2011 October 6, 2012
Lion-O struggles with his destiny to become the next King of Thundera, as chosen by the Sword of Omens. Meanwhile, festivities are held to celebrate General Grune's return to the Cat Kingdom.
2 "Omens, Part 2" Yasuhiro Geshi
Rokou Ogiharu
Tab Murphy July 29, 2011 October 13, 2012
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.
3 "Ramlak Rising" Yoshiharu Ashino
Sean Song
Todd Casey August 5, 2011 October 20, 2012
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.
4 "Song of the Petalars" Yasuhiro Geshi
Sean Song
J.M. DeMatteis August 12, 2011 October 27, 2012
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.
5 "Old Friends" Yoshiharu Ashino
Sean Song
Tab Murphy August 19, 2011 November 3, 2012
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.
6 "Journey to the Tower of
Omens"
Kazuo Nogami
Sean Song
Tab Murphy August 26, 2011 November 10, 2012
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.
7 "Legacy" Kazuyoshi Takeuchi
Sean Song
Todd Casey September 2, 2011 November 17, 2012
As the Thundercats relax outside the Tower of Omens, Lion-O thinks the Book of Omens is tech rather than magic. He attempts to power it up, and is zapped and meets Jaga´s essence inside. He travels back in time in the form of his ancestor named Leo to find out what happend generations ago.
8 "The Duelist and the Drifter" Shingo Uchida
Sean Song
Tab Murphy September 9, 2011 November 24, 2012
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.
9 "Berbils" Yasuhiro Geshi
Takahiro Tanaka
Tab Murphy October 28, 2011 December 1, 2012
Tiny robot bears solicit the help of the ThunderCats to save them from a slave trader who values their technical and construction skills. The Cats help to rescue enslaved Berbils and defend their village. Panthro learns that's he's not the only "wrench monkey" and bonds with Robear Bill.
10 "Sight Beyond Sight" Yoshiharu Ashino Todd Casey November 4, 2011 December 8, 2012
Using the Book of Omens to guide them, the Thundercats find themselves outside a mysterious stone enclosure. Entering in, the group discovers bipedal Elephants, far larger in size and stature than even Panthro.
11 "The Forest of Magi Oar" Tomoya Takahashi Peter Lawrence November 11, 2011 December 15, 2012
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.
12 "Into the Astral Plane" Yoshiharu Ashino Paul Giacoppo November 18, 2011 December 22, 2012
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.
13 "Between Brothers" Shingo Uchida Paul Giacoppo November 25, 2011 December 29, 2012
While Lion-O and Tygra are in the Astral Plane dealing with their issues which have been magnified by the powers of Mumm-Ra who wants them to destroy each other, the other Thundercats protect the village from Slithe, Grune and the Lizard army. The Elephants make a surprising decision after meditating and Lion-O realizes the truth of being betrayed by Tygra. Panthro has some interesting flashbacks while telling Wily Kit and Wily Kat how Grune lost his tooth, and in the end Panthro makes a sacrifice to defeat his enemy.
14 "New Alliances" Yoshiharu Ashino J.M. DeMatteis March 24, 2012 January 5, 2013
Lion-O and the Thundercats try to convince the reptiles to join forces against Mumm-Ra and the ancient evil one is determined to stop them by adding two new generals.
15 "Trials of Lion-O, Part 1" Yoshiharu Ashino Todd Casey March 31, 2012 January 12, 2013
After falling to his death, Lion-O must pass a series of trials to return to life.
16 "Trials of Lion-O, Part 2" Yutaka Kagawa Will Friedle April 7, 2012 January 19, 2013
Lion-O attempts to rescue the other ThunderCats from Mumm-Ra's pyramid
17 "Native Son" Mitsuo Kusakabe Tab Murphy April 14, 2012 January 26, 2013
Lion-O and Tygra discover the village of the lost Tiger clan, but what secrets do they hold?
18 "Survival of the Fittest" Riki Matsuura J.M. DeMatteis April 21, 2012 February 2, 2013
Wilykit and Wilykat are forced to hunt for their food, but something is hunting them!
19 "The Pit" Mitsuo Kusakabe Todd Garfield April 28, 2012 February 9, 2013
Lion-O attempts to rescue a fellow ThunderCat from a fighting arena known as The Pit.
20 "Curse of Ratilla" Tomoya Takahashi Todd Casey May 5, 2012 February 16, 2013
The ThunderCats must infiltrate the mines of Mount Plundarr where Ratar-O is holding Cats as slaves. There they learn the legend ofthe Sword of Plundarr, which they must now retrieve while also freeing their people.
21 "Birth of the Blades" Masayuki Kato Will Friedle May 12, 2012 February 23, 2013
Mumm-ra and his forces are trying to get the Sword of Plunn-Dar from the ThunderCats. Lion-O and Pumyra act as the distraction for the lizards to follow in order for the rest of the ThunderCats to get back to the Thunder Tank. During the distraction, the origins of the Sword of Omens and the Sword of Plunn-Dar are revealed.
22 "The Forever Bag" Yoshiharu Ashino Tab Murphy May 19, 2012 March 2, 2013
Wilykat & Wilykit are still in Dog City to get their stuff back from the pickpocket Tookit who stole them. They join forces with other kids, who work for Tookit and live in "The Forever Bag", to ultimately stop Tookit.
23 "Recipe for Disaster" Riki Matsuura Tab Murphy May 26, 2012 March 9, 2013
Mumm-Ra hunts down the ThunderCats after taking on the form of an undead dragon-like demon named Sykalak, which allows him to fight even in the daylight.However, a supposed "Cure-All Elixir" Lion-O bought from a questionable Wolo salesman turns out to be an unexpected weapon against him.
24 "The Soul Sever" Kenichi Maejima Brandon Easton June 2, 2012 March 23, 2013
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. When Soul Sever steals the Book of Omens in pursuit of this goal, Lion-O risks being turned into one of his mechanical monstrosities.
25 "What Lies Above, Part 1" Shinichi Matsumi Paul Giacoppo June 9, 2012 March 30, 2013
The ThunderCats' search for the next stone leads them high above Thundera to the floating city inhabited by birds.
26 "What Lies Above, Part 2" Shinichi Matsumi Paul Giacoppo June 16, 2012 April 6, 2013
The ThunderCats try to keep Mumm-Ra away from the Tech Stone.

Special

#

Episode Title

Directors

Original Airdate

1 "Snarf: Butterfly Blues" Takuo Tominaga December 6, 2011
Snarf is in charge of watching Baby Lion-O. When a butterfly catches Baby Lion-O's attention, he follows it through town, narrowly avoiding disaster along the way. Snarf does his best to catch up with and save Baby Lion-O, but ends up suffering the consequences that Baby Lion-O escapes. At the end of the day, when Snarf believes he failed by losing Baby Lion-O, the butterfly returns, along with Baby Lion-O. King Claudus congratulates Snarf on a job well done and appoints him as Baby Lion-O's personal caretaker. As Snarf prepares Baby Lion-O for bed, several butterflies appear, much to Baby Lion-O's delight, and to Snarf's chagrin.
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