The Best Episodes of ThunderCats

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8.3/10(205 votes)
#1 - The Last Day
S3:E209/30/1988
With the Mutants and Lunataks gone, the Ancient Spirits of Evil give Mumm-Ra until sunset to destroy all the Thundercats, and to prove they're not bluffing, they exile Ma-Mutt. Mumm-Ra spreads destruction all over Third Earth, sends Tygra, Cheetara, and Panthro to limbo, and buries Lion-O alive. Then he attacks and destroys the Tower of Omens, and the Thunderkittens barely escape, but Mumm-Ra sends them to limbo too. Snarf must go into the Book of Omens to find out how to defeat Mumm-Ra. Jaga and the Thundercats in limbo go into the Eye of Thundera to help Lion-O free himself from his rocky prison. Lion-O then battles Mumm-Ra at Cats Lair and finds out from Snarf that Mumm-Ra only has until sunset to defeat the Thundercats. Mumm-Ra fails and the Ancient Spirits of Evil banish and exile Mumm-Ra from Third Earth. With all their enemies gone, the Thundercats decide to permanently return to New Thundera
Director:Unknown
Writer:J. Larry Carroll
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Director:Unknown
Writer:J. Larry Carroll
8.2/10(225 votes)
#2 - Lion-O's Anointment Second Day: The Trial of Speed
S1:E4211/19/1985
On the second day of his trials, Lion-O must race Cheetara through the dangerous lands of Third Earth. Although Cheetara is by far the fastest among the Thundercats, her speed can only last for a short time period. Lion-O takes a shorter but more dangerous route to make up for Cheetara's advantage.
Director:Unknown
Writer:Leonard Starr
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Director:Unknown
Writer:Leonard Starr
8.1/10(221 votes)
#3 - Lion-O's Anointment First Day: Trial of Strength
S1:E3711/12/1985
On Lion-O's 20th birthday, he must pass a set of trials to become the true Lord of the ThunderCats. Even though he is the hereditary Lord of the ThunderCats, he must prove himself to be worthy of that title. His first test is to beat Panthro in a duel to test his strength.
Director:Unknown
Writer:Leonard Starr
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Director:Unknown
Writer:Leonard Starr
8.0/10(241 votes)
#4 - Return to Thundera
S1:E2010/4/1985
The Thundercats briefly show Lion-O how the time capsule they recovered from the caveman works. Curious to see more, Lion-O activates it during his night-time watch, and gets caught in its projection rays. The rays send him back in time to Thundera, just before the final tremor that destroyed the planet. Meanwhile, the Mutants have built an evil robot monster that is destroying Cats' Lair. Back on Thundera, Lion-O encounters his father, Claudus, and saves him from a Mutant attack. In return, Claudus gives Lion-O the plans to the robot that was attacking the Thundercats in his own time.
Director:Unknown
Writer:Bob Haney
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Director:Unknown
Writer:Bob Haney
8.0/10(229 votes)
#5 - Safari Joe
S1:E2410/10/1985
An evil hunter lands on third earth in search of prey to hunt. His holographic machine can tell him about all of the Thundercats, including their strengths and weaknesses, and he is able to hunt down each one of them and put them in Thundrainium cells. He captures all of them but Lion-O and Snarf. Jaga warns Lion-O about Safari Joe before he sets out to save his comrades, and Lion-O is able to defeat him and release his friends.
Director:Unknown
Writer:Steve Perry
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Director:Unknown
Writer:Steve Perry
8.0/10(218 votes)
#6 - Lion-O's Anointment Fourth Day: The Trial of Mind Power
S1:E5011/29/1985
Lion-O undergoes the fourth task in his Anointment Trial.
Director:Unknown
Writer:Leonard Starr
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Director:Unknown
Writer:Leonard Starr

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8.0/10(2 votes)
#7 - The Superpower Potion
S1:E5912/12/1985
Vultureman invents a Super Power Potion which give him magical powers, enabling him to mesmerize and defeat Tygra.
Director:Unknown
Writer:Chris Trengove
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Director:Unknown
Writer:Chris Trengove
8.0/10(2 votes)
#8 - Eye of the Beholder
S1:E6012/13/1985
Jackalman ambushes Snarf and attempts to steal the Sword of Omens. This gives Panthro the idea to make a duplicate sword as bait for the Mutants.
Director:Unknown
Writer:Ken Vose
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Director:Unknown
Writer:Ken Vose
8.0/10(2 votes)
#9 - Fond Memories
S1:E6512/20/1985
Mumm-Ra creates a museum where painting and statues come alive to oppose the ThunderCats.
Director:Unknown
Writer:Lee Schneider
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Director:Unknown
Writer:Lee Schneider
8.0/10(188 votes)
#10 - Hair of the Dog
S2:E2410/1/1987
While all the ThunderCats except Lion-O are gone, Mumm-Ra switches Ma-Mutt with Snarf. Ma-Mutt poisons Lion-O, allowing Mumm-Ra to move in.
Director:Unknown
Writer:Chris Trengove
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Director:Unknown
Writer:Chris Trengove
8.0/10(186 votes)
#11 - Vultureman's Revenge
S2:E2510/2/1987
Vultureman builds a Thundranium[28] projector, capable of creating concentrated regions of Thundranium. When the ThunderKittens damage it, he damages their spaceboard, sending them off into danger. While Lion-O and Snarf search desperately for them, Vultureman plans his revenge.
Director:Unknown
Writer:Herb Engelhardt
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Director:Unknown
Writer:Herb Engelhardt
7.9/10(274 votes)
#12 - The Ghost Warrior
S1:E119/23/1985
Two Bolkins (sheep-like beings from Third Earth) unleash the ghost of Grune the Destroyer, a renegade Thundercat who once terrorised Third Earth and now turns his attention to the Thundercats.
Director:Unknown
Writer:Leonard Starr
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Director:Unknown
Writer:Leonard Starr
7.9/10(220 votes)
#13 - Snarf Takes Up the Challenge
S1:E2510/11/1985
Nearly all the Thundercats have been captured by the Mutants and imprisoned in Mumm-Ra's Pyramid, forcing Snarf to use his own talents to free them.
Director:Unknown
Writer:Peter Lawrence
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Director:Unknown
Writer:Peter Lawrence
7.9/10(215 votes)
#14 - Lion-O's Anointment Third Day: Trial of Cunning
S1:E4611/25/1985
Wily Kit and Kat stand in Lion-O's way on the third day of his trials. Lion-O must beat them through the maze of infinity. Attempting to stop Lion-O and slow him down, the kids set traps in the maze. He manages however to avoid their traps. In order to beat them through the maze, Lion-O plays their own tricks on them, and tricks them into losing the race through the maze.
Director:Unknown
Writer:Leonard Starr
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Director:Unknown
Writer:Leonard Starr
7.9/10(193 votes)
#15 - Mumm-Rana's Belt
S2:E219/28/1987
Luna discovers that her grandmother's magic belt is now in the possession of Mumm-Rana, who claimed it after battle. She heads straight for the white pyramid, with Pumyra hot on her tail.
Director:Unknown
Writer:James Rose
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Director:Unknown
Writer:James Rose
7.9/10(190 votes)
#16 - Hachiman's Honor
S2:E229/29/1987
While Hachiman is on his way to the Tower of Omens, Luna steals his sword, the ThunderCutter, and gives it to an automaton. Lion-O and the ThunderKittens head out to find their old friend.
Director:Unknown
Writer:J. Larry Carroll
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Director:Unknown
Writer:J. Larry Carroll
7.9/10(185 votes)
#17 - ThunderCubs (5)
S3:E59/9/1988
Lion-O frees the Thundercubs from Mumm-Ra's spell and the Thundercubs safely leave New Thundera. Lion-O and Snarf must confront Mumm-Ra and get the Book of Omens. After they defeat Mumm-Ra, they ask Mu-Mutt (using a magical flute) to use Mumm-Ra's ""device"" to get them back to Third Earth. Meanwhile the Lunataks capture some Berbils and the Thundercubs return to Third Earth and they and the Thunderkittens must go to Sky Tomb to free the other Thundercats and the Berbils. After everyone is freed, they are all cornered by the Lunataks, but Lion-O and Snarf arrive to save the day. The Thundercubs must then go in the Cave of Time to become Thundercats again and Mumm-Ra is abandoned on New Thundera and the Ancient Spirits bring him back to Third Earth.
Director:Unknown
Writer:Peter Lawrence
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Director:Unknown
Writer:Peter Lawrence
7.9/10(186 votes)
#18 - Key to Thundera
S3:E119/19/1988
While trying to figure out a way to read the Book of Omens, Lion-O tries looking through the sword at the book. He is immediately drawn into the book, where a voice asks him if he has ""the key."" Lion-O says he doesn't, and four dragon heads appear and shoot fire at him. Snarf, who saw Lion-O get sucked into the book, tries to show Cheetara what happened, and he too gets sucked in. Mumm-Ra, who also watched Lion-O get sucked in, goes to cats lair and takes the book so he can destroy it with Lion-O inside. Meanwhile, just by coincidence, Panthro finds an odd looking key on Thundera. He and Tygra head back to Third Earth with the key, not knowing what it's for. Back on Third Earth, Mumm-Ra is just about to boil the book when Lion-O calls for the sword, and it brings him and Snarf back outside. Mumm-Ra takes the sword and looks through it at the book, and he gets sucked in! But Lion-O has to save him because of the code of Thundera, and Lion-O does save him. Panthro and Tygra arrive with t
Director:Unknown
Writer:Matthew Malach
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Director:Unknown
Writer:Matthew Malach
7.9/10(197 votes)
#19 - Return to Thundera (5)
S4:E59/8/1989
After another earthquake caused by Mumm-Ra ruins the new Cats Lair construction site, the Thundercats go to see Jaguara and confront Mumm-Ra. Unfortunately, Mumm-Ra puts up a force field over entrance. Jaga appears to Lion-O and tells him to use the Eye of Thundera to get to Jaguara and the Gyroscope. Lion-O does so and battles Mumm-Ra, who throws him into the bottomless pit underneath the Gyroscope. Lion-O however, manages to throw his grappling hook to the top, which pulls him back up. Lion-O then shines the signal, which goes through the force field. All the Thundercats leap through the signal which takes them through the force field. Together, they fire all their weapons at Mumm-Ra and he is defeated. But before he leaves, he breaks the cord that holds the Gyroscope above the pit and it falls through. Now, New Thundera is literally falling apart. But Lion-O throws the sword in the spot where the Gyroscope used to be and calls upon the Thundercat Ancestors for help. The sword starts
Director:Unknown
Writer:Peter Lawrence
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Director:Unknown
Writer:Peter Lawrence
7.8/10(235 votes)
#20 - Spitting Image
S1:E1810/2/1985
Mumm-Ra creates device that can make Panthro clones. He embeds the spirit of Hammerhand into his clone and sets it free to destroy Third Earth. The Third Earth inhabitants blame the Thundercats for the terror because they think its the real Panthro destroying their villages and burning their crops. The real Panthro finally encounters his clone and, with the help of Lion-O, manages to destroy it. Enraged about his defeat, Hammerhand destroys Mumm-Ra's cloning device.
Director:Unknown
Writer:Howard Post
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Director:Unknown
Writer:Howard Post
7.8/10(212 votes)
#21 - Feliner (1)
S1:E2910/31/1985
Vultureman summons Ratar-O to take him to the planet of the Snarfs to capture one of them and use it as ransom with the Thundercats. Snarf, thinking his entire race was wiped out when Thundera blew up, finds out that they have captured Snarfer, his little nephew. The Thundercats set out to find the Mutants and save Snarfer. After successfully saving Snarfer, the Thundercats are faced with the problem of returning Snarfer to his planet. Panthro cleverly invents the Feliner, a spaceship. In order for it to work, though, the machine need a hyperspace mega-condenser. Snarf reminds him that there is one on Ratar-O's Ratstar. The Thundercats once again pursue the Mutants to the wreckage site of the Ratstar to take their mega-condenser.
Director:Unknown
Writer:Steve Perry
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Director:Unknown
Writer:Steve Perry
7.8/10(208 votes)
#22 - The Mumm-Ra Berbil
S1:E4711/26/1985
Mumm-ra transforms himself into a ro-bear berbil (a Thundercat ally). He acts hurt and the Thundercats let him stay at Cats Lair. One night, Mumm-ra(the berbil) puts all the Thundercats under his spell, except Snarf, because Tygra held off Mumm-ra just long enough for Snarf to escape. Lion-O was sleeping out in the woods, and Snarf ran to him and told him what happened. Lion-O came back and fought Mumm-ra, who was actually beating Lion-O. Mumm-ra was wearing special glasses so he couldn't see his reflection. Eventually, Lion-O used the Thundercat signal, broke Mumm-ra's spell and his glasses, and finally defeated him with his reflection.
Director:Unknown
Writer:Jeri Craden
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Director:Unknown
Writer:Jeri Craden
7.8/10(185 votes)
#23 - Mumm-Ra Lives (1)
S2:E69/7/1987
Mumm-Ra is weak and faces the threat of three new ThunderCats; he sends the Mutants to release his old enemies, the Lunatacs, imprisoned in Dark Side[29] in order to bolster the forces of evil. The ThunderCats' celebration of their victory over Mumm-Ra and the welcoming of three new ThunderCats is cut short when Snarf overhears plans at Castle Plun-darr after he chased Ma-Mutt there from the Berbil village.
Director:Unknown
Writer:Leonard Starr
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Director:Unknown
Writer:Leonard Starr
7.8/10(187 votes)
#24 - Runaways
S2:E239/30/1987
Fed up of feeling useless, Wilykat convinces his twin to run away from home, but living on their own is more dangerous than they realized. The other ThunderCats search desperately to find them as they all must learn a lesson in communication.
Director:Unknown
Writer:Bill Ratter
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Director:Unknown
Writer:Bill Ratter
7.8/10(186 votes)
#25 - The Chain of Loyalty
S3:E79/13/1988
After looking at the Book of Omens, and seeing a picture of a necklace, Lion-O discovers that there are pictures of the Thundercats on the necklace. Jaga appears to Lion-O and tells him that he is looking at a picture of the Chain of Loyalty. Jaga tells Lion-O that if the chain gets broken, it would cause the Thundercats to turn against each other. In hearing this, Lion-O and the Thundercats (Panthro, Tygra, Cheetara, and the Thunderkittens) set off to Thundera to find the chain. Mumm-ra, eavesdropping on Lion-O through his pool at the pyramid, goes to Thundera, kidnaps and disguises himself as Snarf. When the Thundercats arrive, they split up into groups to find the chain, and Mumm-Ra goes with Lion-O and the Thunderkittens. Lion-O's group finds the chain and Mumm-Ra gets it, breaks it, and returns to his true form. For a while, the Thundercats, except Lion-O, fight against each other until Lion-O uses the sword of Omens, which magically puts the necklace back together. Mumm-ra is def
Director:Unknown
Writers:Peter Lawrence, Bill Ratter
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Director:Unknown
Writers:Peter Lawrence, Bill Ratter