ThunderCats (1985–1989)

1. S01E01ExodusJanuary 23, 1985 8.1With their home planet, Thundera, about to explode, the Thunderians flee to a distant galaxy. Before they can make the long journey the Muta
2. S01E02Season's bestThe Unholy AllianceJanuary 23, 1985 8.4The 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 j
3. S01E03BerbilsSeptember 11, 1985 7.4The 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 caugh
4. S01E04The Slaves of Castle Plun-DarrSeptember 12, 1985 7.4The 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
5. S01E05Pumm-RaSeptember 13, 1985 8.0Mumm-Ra uses his shapeshifting abilities to pass himself off as a Thunderian so he can stage the "rescue" of Cheetara and infiltrate Cats' L
6. S01E06The Terror of HammerhandSeptember 16, 1985 7.3When Snarf and a young unicorn are captured by the pirate Hammerhand and his crew of Berserkers, Lion-O goes to rescue them.
7. S01E07Trouble with TimeSeptember 17, 1985 8.0With their supply of Thundrillium running low, the Thundercats set off in search of a fresh supply. Tygra detects a large deposit in a cave
8. S01E08The Tower of TrapsSeptember 18, 1985 8.0Wilykit and Wilykat try to stop a band of living gargoyles from robbing a Wollo but fail to do so and trail the gargoyles to a nearby Tower.
9. S01E09The Garden of DelightsSeptember 19, 1985 8.0While investigating an earthquake, Tygra stumbles across the Garden of Delights and meets a talking plant named Silky, who offers him her fr
10. S01E10Mandora: the Evil ChaserSeptember 20, 1985 7.2Lion-O and Snarf stumble upon a portable jail cell, and mistakenly open it up. Three of the galaxy's worst villains escape. One of them, a s
11. S01E11The Ghost WarriorSeptember 23, 1985 7.3Two Bolkins (sheep-like beings from Third Earth) unleash the ghost of Grune the Destroyer, a renegade Thundercat who once terrorised Third E
12. S01E12The DoomgazeSeptember 24, 1985 7.5Mumm-Ra and the Mutants plot to open the Time Warp Prison and release the evil Princess Ta-She in order to use her deadly Doomgaze against t
13. S01E13Lord of the SnowsSeptember 25, 1985 6.7When a meteorite made of pure Thundrillium crashes on Hook Mountain, the Thundercats decide to use it to replenish their depleted energy sup
14. S01E14The Spaceship Beneath the SandsSeptember 26, 1985 7.0Tired of constantly being bested by the Thundercats, the Mutants have Mumm-Ra raise their spaceship and salvage their vehicles.
15. S01E15The Time CapsuleSeptember 27, 1985 6.4Lion-O becomes homesick, and his memories of Thundera are almost nonexistent. Jaga appears to Lion-O and tells him that on their spaceship,
16. S01E16The Fireballs of Plun-DarrSeptember 30, 1985 8.0The Mutants, once again searching for a way to destroy the Thundercats, recover some more items from their spaceship. They take their ship's
17. S01E17All That GlittersOctober 1, 1985 8.0Mumm-Ra tricks Lion-O into using the Sword of Omens against Tygra, causing the blade to break in half and lose its powers. The only way Lion
18. S01E18Spitting ImageOctober 2, 1985 6.0Mumm-Ra creates device that can make Panthro clones. He embeds the spirit of Hammerhand into his clone and sets it free to destroy Third Ear
19. S01E19MongorOctober 3, 1985 6.0Wilykit and Kat accidentally free an ancient monster that was banished to an old shrine centuries ago. The evil monster, Mongor, begins to d
20. S01E20Return to ThunderaOctober 4, 1985 6.0The Thundercats briefly show Lion-O how the time capsule they recovered from the caveman works. Curious to see more, Lion-O activates it dur
21. S01E21Dr. DometoneOctober 7, 1985 6.0An 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 whi
22. S01E22The Astral PrisonOctober 8, 1985 6.0Jaga is captured by Nemex, an evil being in the Astral World, and Lion-O tries to find a way to rescue him. Third Earth legend says that the
23. S01E23The Crystal QueenOctober 9, 1985 6.0The Thundercats think that Snarf is getting too old, and that he is not up to doing as much as he does. To prove them wrong, Snarf saves the
24. S01E24Safari JoeOctober 10, 1985 8.0An evil hunter lands on third earth in search of prey to hunt. His holographic machine can tell him about all of the Thundercats, including
25. S01E25Snarf Takes Up the ChallengeOctober 11, 1985 6.0Nearly all the Thundercats have been captured by the Mutants and imprisoned in Mumm-Ra's Pyramid, forcing Snarf to use his own talents to fr
26. S01E26Sixth SenseOctober 28, 1985 6.0An alien spaceship crash lands on third earth, and it can somehow communicate with Cheetara through her sixth sense. She becomes a part of t
27. S01E27The Thunder-CutterOctober 29, 1985 6.0Mumm-Ra summons the great samurai Hachiman to seek and destroy Lion-O. He tells Hachiman that Lion-O and the Thundercats are destroying his
28. S01E28The WolfratOctober 30, 1985 6.7Mumm-Ra has a phial of miniaturization gas. Vultureman builds a mechanical Wolfrat to infiltrate the gas into the Cats' Lair. The ThunderCat
29. S01E29Feliner (1)October 31, 1985 6.0Vultureman 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,
30. S01E30Feliner (2)November 1, 1985 6.0The ThunderCats race to try to salvage the part they need for the Feliner from the wreck of the Rat Star before the Mutants can complete rep
31. S01E31Mandora and the PiratesNovember 4, 1985 6.0Mandora, on space-patrol, encounters an old pirate ship which doesn't meet inter-galactic standards. She boards the ship, arrests the pirat
32. S01E32Return of the DrillerNovember 5, 1985 6.0The Driller, Mumm-Ra's servant who captured Panthro for him in Spitting Image, returns to aid Mumm-Ra once again. His job this time is to dr
33. S01E33Dimension DoomNovember 6, 1985 6.0Wiz-Ra, Mumm-Ra's enemy from long ago, comes back every 7000 years through a portal that just happens to be in Cheetara's bedroom. Wiz-Ra w
34. S01E34Queen of 8 LegsNovember 7, 1985 6.0Mumm-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
35. S01E35Sword in a HoleNovember 8, 1985 6.0Mumm-Ra hires Captain Shiner to send a fake distress signal to the ThunderCats. With their new vehicle, the Feliner, the ThunderCats set ou
36. S01E36The Evil Harp of Charr-NinNovember 11, 1985 6.0Wilykit 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 d
37. S01E37Lion-O's Anointment First Day: Trial of StrengthNovember 12, 1985 6.0On 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
38. S01E38The DemolisherNovember 13, 1985 6.0A vagabond space traveler lands on Third Earth to challenge Mumm-Ra to a fight. The Demolisher is victorious against Mumm-Ra and sends him
39. S01E39Monkian's BargainNovember 14, 1985 6.0Monkian goes to Mumm-Ra and agrees to give him anything if Mumm-Ra will make him powerful enough to rule Third Earth. Mumm-Ra agrees, and g
40. S01E40Tight SqueezeNovember 15, 1985 6.0After the Mutants fail to ambush and defeat the Thundercats with Vultureman's new Thundrainium cannon, Vultureman, furious about the failed
41. S01E41The MicritsNovember 18, 1985 6.0Micrits, a tiny race of human-like figures, happen to live right outside Cats' Lair. Unaware of their existence, Lion-O manages to continuo
42. S01E42Lion-O's Anointment Second Day: The Trial of SpeedNovember 19, 1985 6.0On the second day of his trials, Lion-O must race Cheetara through the dangerous lands of Third Earth. Although Cheetara is by far the faste
43. S01E43The Rock GiantNovember 20, 1985 6.0Mumm-Ra awakens the Rock Giant, an ancient monster made of stone which looked like a mountain to the TCats. When it wakes up, Mumm-Ra sends
44. S01E44Jackalman's RebellionNovember 21, 1985 6.0The normally submissive JackalMan decides to start his own army in hopes of conquering Third Earth by himself. He does manage to give the Th
45. S01E45Turmagar the TuskaNovember 22, 1985 6.0An evil robot monster is attacking the Tuska Village, in an area unexplored by the Thundercats. Turmagar, the leader of the Tuskas, travels
46. S01E46Lion-O's Anointment Third Day: Trial of CunningNovember 25, 1985 6.0Wily 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 sto
47. S01E47The Mumm-Ra BerbilNovember 26, 1985 6.0Mumm-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,
48. S01E48Mechanical PlagueNovember 27, 1985 6.0Panthro invents flying video cameras which are suppose to record the events that take place on third-earth so they could create their own ho
49. S01E49TrappedNovember 28, 1985 6.0When a big storm hits Third Earth, the Thunderkittens are trapped in an old space capsule. Meanwhile, Tygra and Cheetra almost crash the Fel
50. S01E50Lion-O's Anointment Fourth Day: The Trial of Mind PowerNovember 29, 1985 6.0Lion-O undergoes the fourth task in his Anointment Trial.
51. S01E51ExcaliburDecember 2, 1985 6.0The story of Excalibur, the greatest sword in history, is revealed to Mumm-Ra, who is then determined to find the Excalibur and defeat Lion-
52. S01E52Secret of the Ice KingDecember 3, 1985 6.0A giant Ice King is accidentally released from his glacial prison and attacks the Castle of the Snowmen.
53. S01E53Good and UglyDecember 4, 1985 6.0A Terator Starship, an extremely ugly spaceship, is pursued by a Kymera Craft, a visually appealing spaceship. The Terator Spaceship escapes
54. S01E54The TransferDecember 5, 1985 6.0A spaceship freighted with a lethal radioactive sphere is on a collision course for Third Earth.
55. S01E55Divide and ConquerDecember 6, 1985 6.0Vultureman invents a voice imitator that imitates the ThunderCats' voices. He uses it to lure the ThunderCats into perilous situations.
56. S01E56Dream MasterDecember 9, 1985 6.0Mumm-Ra transforms into Mumm-Ra the Dream Master and summons spectral Dream Selves from the sleeping Panthro, Cheetara, Tygra, Wilykat, and
57. S01E57Out of SightDecember 10, 1985 6.0Willa is practicing her long-bow skills when a warning device alerts her to a Mutant attack. Willa is captured and the ThunderCats rush to r
58. S01E58The MountainDecember 11, 1985 6.0Mumm-Ra summons the Mutants and threatens to banish them from Third Earth unless they bring him the Sword of Omens.
59. S01E59The Superpower PotionDecember 12, 1985 8.0Vultureman invents a Super Power Potion which give him magical powers, enabling him to mesmerize and defeat Tygra.
60. S01E60Eye of the BeholderDecember 13, 1985 8.0Jackalman ambushes Snarf and attempts to steal the Sword of Omens. This gives Panthro the idea to make a duplicate sword as bait for the Mut
61. S01E61Lion-O's Anointment Final Day: The Trial of EvilDecember 16, 1985 6.0The concluding trial in Lion-O's Anointment Trials pits him alone and weaponless against the evil Mumm-Ra.
62. S01E62The Trouble with ThunderKittensDecember 17, 1985 6.0To prove themselves worthy of being ThunderCats, the ThunderKittens borrow the other ThunderCats' weapons and practice with them. They are a
63. S01E63Mumm-RanaDecember 18, 1985 6.0The Feliner is attacked by the RatStar, manned by the Mutants. Jackalman, Monikan, and S-S-Slithe are ejected and saved by Mumm-Rana, a fema
64. S01E64The ShifterDecember 19, 1985 6.0Vultureman invents the Shifter, a device that can switch personalities, and uses it on Panthro's personality and Snarf's body.
65. S01E65Fond MemoriesDecember 20, 1985 8.0Mumm-Ra creates a museum where painting and statues come alive to oppose the ThunderCats.

Season 1 ranked & reviewed

1. S02E01Season's bestThunderCats Ho! (1)September 8, 1986 8.0Recurring nightmares of Thunderians killed on Thundera as he fled to safety with Jaga and the other ThunderCats awaken Lion-O. Jaga comes to
2. S02E02ThunderCats Ho! (2)September 9, 1986 8.0Lion-O's rescue attempt fails and the captured Thunderians are taken to Fire Rock Mountain after another failed attempt on their part to bre
3. S02E03ThunderCats Ho! (3)September 10, 1986 8.0Lion-O loses the Sword of Omens in an avalanche. Panthro battles the Fist-Pounder with the ThunderTank. The Mutants arrive at Fire Rock Moun
4. S02E04ThunderCats Ho! (4)September 11, 1986 6.0The Thunderians attempt to escape their prison. Lion-O arrives at Fire Rock Mountain and is confronted by Hachiman who believes Lion-O is ca
5. S02E05ThunderCats Ho! (5)September 12, 1986 6.0Lion-O and Hachiman are reconciled and the ThunderCats close in on rescuing the Thunderians from Fire Rock Mountain. But they'll need supern
6. S02E06Mumm-Ra Lives (1)September 7, 1987 6.0Mumm-Ra is weak and faces the threat of three new ThunderCats; he sends the Mutants to release his old enemies, the Lunatacs, imprisoned in
7. S02E07Mumm-Ra Lives (2)September 8, 1987 6.0The Mutants succeed in releasing the Lunatacs. The ThunderCats discover their Thundrylium mine is being looted and people are being kidnappe
8. S02E08Mumm-Ra Lives (3)September 9, 1987 6.0The ThunderCats build the Tower of Omens to monitor for Sky Tomb, which will be run by the new ThunderCats. Disguised as a Berbil, Ma-Mutt s
9. S02E09Mumm-Ra Lives (4)September 10, 1987 6.0Mumm-Ra's power is restored. Snarfer makes it to Third Earth, but crashes in Dark Side. The ThunderCats rush to his aid before the Lunatacs
10. S02E10Mumm-Ra Lives (5)September 11, 1987 6.0The ThunderCats look for Sky Tomb to free the slaves imprisoned inside it. Bengali must learn the importance of teamwork as Lion-O leaves hi
11. S02E11CatfightSeptember 14, 1987 6.0By disguising himself as Jaga, Mumm-Ra tricks Lion-O into believing the new ThunderCats are traitors so that they will fight amongst themsel
12. S02E12Psych OutSeptember 15, 1987 6.0Mumm-Ra tells Alluro where to find a talisman that boosts the self-confidence of the one who possesses it so that they become nearly invinci
13. S02E13The Mask of GorgonSeptember 16, 1987 6.0Ma-Mutt digs up an ancient book, which leads Mumm-Ra to search for the ancient evil of the mask of Gorgon
14. S02E14The Mad BubblerSeptember 17, 1987 6.0The Lunatacs look for Thundrylium in a cave on Hook Mountain, only to be driven mad by a strange creature that turns them against each other
15. S02E15Together We StandSeptember 18, 1987 6.0Mumm-Ra coats the Bezerker's weapons and armor with Thundranium. Wilykit and Wilykat find that guarding Cats' Lair is not always a breeze.
16. S02E16Ravage IslandSeptember 21, 1987 6.0Mumm-Ra activates a mesmerizing beacon on Ravage Island, which draws the ThunderCats to it and takes hold of their minds.
17. S02E17Time SwitchSeptember 22, 1987 6.0While taking care of a dangerous Suspension Capsule, dug up near Cats' Lair, Lion-O is exposed to harmful gasses inside that cause him grow
18. S02E18The Sound StonesSeptember 23, 1987 6.0Vultureman 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.
19. S02E19Day of the EclipseSeptember 24, 1987 6.0The day of the centennial total eclipse has arrived, and any spell Mumm-Ra casts will last until the next eclipse. He declares a "Day of Dec
20. S02E20SideswipeSeptember 25, 1987 6.0Chilla freezes Snarfer's spaceship as he heads back to the Tower of Omens with Berbil Mexican takeout. When Mandora gets involved, Chilla fr
21. S02E21Mumm-Rana's BeltSeptember 28, 1987 6.0Luna discovers that her grandmother's magic belt is now in the possession of Mumm-Rana, who claimed it after battle. She heads straight for
22. S02E22Hachiman's HonorSeptember 29, 1987 6.0While 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 T
23. S02E23RunawaysSeptember 30, 1987 6.0Fed up of feeling useless, Wilykat convinces his twin to run away from home, but living on their own is more dangerous than they realized. T
24. S02E24Hair of the DogOctober 1, 1987 6.0While 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.
25. S02E25Vultureman's RevengeOctober 2, 1987 6.0Vultureman builds a Thundranium[28] projector, capable of creating concentrated regions of Thundranium. When the ThunderKittens damage it, h

Season 2 ranked & reviewed

1. S03E01Season's bestThunderCubs (1)September 5, 1988 6.0Mumm-Ra learns about the Treasure of Thundera and the Sword of Plundarr (Jaga had beaten Ratilla, who owned the Sword, and then buried the s
2. S03E02ThunderCubs (2)September 6, 1988 6.0Lion-O and the other Thundercats arrive and save Lynx-o and the Thunderkittens from Red Eye and Tug Mug. The Thundercats learn more about Ne
3. S03E03ThunderCubs (3)September 7, 1988 6.0Mumm-Ra retrieves the Sword of Plundarr and the Thundercats arrive on New Thundera. While the Thundercats want to get the Sword and treasure
4. S03E04ThunderCubs (4)September 8, 1988 6.0Mumm-Ra tries to get away but the Sword of Omens breaks open the casket dropping the treasure all over the planet, and Snarf, Snarfer, and o
5. S03E05ThunderCubs (5)September 9, 1988 6.0Lion-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
6. S03E06Totem of DeraSeptember 12, 1988 6.0Mumm-ra finds the Totem of Dera (a part of the T-cat treasure) which has special healing powers and can bring inanimate objects to life. He
7. S03E07The Chain of LoyaltySeptember 13, 1988 6.0After 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 n
8. S03E08Crystal CanyonSeptember 14, 1988 6.0Lion-O, Lynx-O, Snarf and Tygra go to the Crystal Canyon, thinking the Lunataks somehow got the Treasure of Thundera. While there, they enco
9. S03E09The Telepathy BeamSeptember 15, 1988 6.0Vultureman creates a device that plays around with Cheetara's sixth sense. She begins to see images that aren't real, and she soon begins to
10. S03E10Exile IsleSeptember 16, 1988 6.0The Thundercats capture the Lunataks and, tired of dealing with their evil ways, decide to exile the Lunataks to Exile Isle, an island in sp
11. S03E11Key to ThunderaSeptember 19, 1988 6.0While 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
12. S03E12Return of the ThunderCubsSeptember 20, 1988 6.0Panthro, Tygra, and Cheetara return to New Thundera in the Feliner to find more of the Treasure of Thundera, but Mumm-Ra shoots the Feliner
13. S03E13The FormulaSeptember 21, 1988 6.0Aluro invents a ""booster"" potion in hopes that it can make Sky Tomb able to fly to Thundera. It doesn't work, and he throws the potion int
14. S03E14Locket of LiesSeptember 22, 1988 6.0On 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 lock
15. S03E15Bracelet of PowerSeptember 23, 1988 6.0Tygra, Cheetara, and Bengali bring back a few more pieces of the Treasure of Thundera. Snarf is fascinated by a bracelet and takes it to wea
16. S03E16The Wild WorkoutSeptember 26, 1988 6.0Lion-O, Panthro, and Snarf set out to look for more pieces of the Treasure of Thundera, and Mumm-Ra sets a trap for them. He freezes them in
17. S03E17The ThunderscopeSeptember 27, 1988 6.0Back visiting their old wreckage site, Lion-O and Snarf stumble upon the Thunder-scope, a legendary thunderian telescope that locates lost t
18. S03E18The Jade DragonSeptember 28, 1988 6.0Mumm-Ra discovers the power of one of the pieces of the treasure of Thundera. The Double-Headed Dragon of Doom, or the Jade Dragon possess t
19. S03E19The Circus TrainSeptember 29, 1988 6.0A bounty hunter known as Captain Bragg comes to Third Earth to help the Thundercats get rid of the Mutants and the Lunatacks. Capt Bragg tri
20. S03E20The Last DaySeptember 30, 1988 6.0With the Mutants and Lunataks gone, the Ancient Spirits of Evil give Mumm-Ra until sunset to destroy all the Thundercats, and to prove they'

Season 3 ranked & reviewed

1. S04E01Season's bestReturn to Thundera (1)September 4, 1989 6.0The Ancient Spirits of Evil give new life to Mumm-Ra and Ma-Mutt, send them to New Thundera, and build a new Pyramid for Mumm-Ra. The Thunde
2. S04E02Return to Thundera (2)September 5, 1989 6.0More and more earthquakes are ocurring because of the malfunctioning Gyroscope. Meanwhile Lion-O recieves a distress signal from Thunderian
3. S04E03Return to Thundera (3)September 6, 1989 6.0Lion-O, Panthro, and the Thunderkittens take the Whisker, a new flying vehicle, to the Churning Rocks to rescue the Thunderian refugees who
4. S04E04Return to Thundera (4)September 7, 1989 6.0Mumm-Ra sends Ma-Mutt disguised as Mandora to free the Mutants from Capt. Bragg's circus train and sends Bragg and Crowman falling into deep
5. S04E05Return to Thundera (5)September 8, 1989 6.0After another earthquake caused by Mumm-Ra ruins the new Cats Lair construction site, the Thundercats go to see Jaguara and confront Mumm-Ra
6. S04E06LeahSeptember 11, 1989 6.0The 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 e
7. S04E07FrogmanSeptember 12, 1989 6.0Wily Kit and Kat are constructing a well for the New Cat's Lair on New Thundera. The Thundercats on New Thundera receive a distress signal f
8. S04E08The HeritageSeptember 13, 1989 6.0Wily 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
9. S04E09ScrewlooseSeptember 14, 1989 6.0Jaguara cannot work New Thundera’s Gyro on her own. The Thundercats order a robot to aid her in running the Gyro. Screw Loose, a robot who s
10. S04E10MalcarSeptember 15, 1989 6.0Mumm-Ra summons Malcar, an ancient alchemist, to return from the dead. The alchemist returns old and weak, as he was when he died. Mumm-Ra t
11. S04E11Helpless LaughterSeptember 18, 1989 6.0A convergence of the Moons of Plun-Darr causes a drought on Thundera. Panthro and Snarf go looking for water, then Ezuka, the flying Serpent
12. S04E12Cracker's RevengeSeptember 19, 1989 6.0Capt. Cracker and his mechanical parrot Polly land on Way-Out Back and free the Lunatacs and put Bragg and Crownan in one of the train's cag
13. S04E13The Mossland MonsterSeptember 20, 1989 6.0Tygra, on a solo trip to New Thundera to meet the other Thundercats, decides to take a shortcut through a meteor shower. His ship is damaged
14. S04E14Ma-Mutt's ConfusionSeptember 21, 1989 6.0Mumm-Ra has a new device, the Babylonian Barbarian Boiler, that he plans to use on Cats Lair. Ma-Mutt fools around too much and Mumm-Ra bani
15. S04E15ShadowmasterSeptember 22, 1989 6.0From the Shadow Realm, the Shadowmaster contacts the Ancient Spirits of Evil (ASOE), telling them of how he captured Lion-O's father, Claudu
16. S04E16Swan SongSeptember 25, 1989 6.0An Ecology Inspector (EI) comes to Thundera to inspect the new Cats Lair. His ship uses the SWAN system (Space Way Airborn Navigations) to d
17. S04E17Touch of AmortusSeptember 26, 1989 6.0Mumm-Ra orders Amortus, a being he banished to the Land of No Return centuries ago, to destroy Lynx-O. Amortus makes Lynx-O crash in the Thu
18. S04E18The Zaxx FactorSeptember 27, 1989 6.0Vultureman escapes from exile by hijacking a bookmobile. He finds a disk containing ancient history about two powerful evil forces on Third
19. S04E19Well of DoubtSeptember 28, 1989 6.0The Thundercats use a new Tower signal to guide a Thunderian ship in; aboard are Baron Tass and Mr. Grubber, a devious pair of Thunderians.
20. S04E20The Book of OmensSeptember 29, 1989 6.0New Thundera is being torn apart and the Thundercats must present certain artifacts at various dangerous locations that used to be beautiful

Season 4 ranked & reviewed