Episode 1
Aired Sep 8, 1986
ThunderCats Ho!
A nightmare of three other Thunderians sacrificing their lives to save him, torments Lion-O.
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Episode 2
Aired Sep 9, 1986
ThunderCats Ho!
Using his new vehicle, the Thunderclaw, Panthro attacks the Berserkers' ship to free the Thunderian prisoners aboard.
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Episode 3
Aired Sep 10, 1986
ThunderCats Ho!
Lion-O prepares to battle Monikan in the Fistpounder on Hook Mountain, when they are caught in an avalanche.
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Episode 4
Aired Sep 11, 1986
ThunderCats Ho!
The sun drains the powers of Mumm-Ra's mummy bandages and Lion-O escapes from their grasp.
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Episode 5
Aired Sep 12, 1986
ThunderCats Ho!
As Lion-O hangs from the bridge at Fire Rock Mountain, weakened by the Thunderians pits below, Hachiman finally realizes that Mumm-Ra tricked him into believing that Lion-O had turned evil.
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Episode 6
Aired Sep 15, 1986
Mumm-Ra Lives
Mumm-Ra is weak and faces the threat of three new Thundercats, so he sends the Mutants to release his old enemies the Lunataks from their imprisonment in order to bolster the dark forces.
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Episode 7
Aired Sep 16, 1986
Mumm-Ra Lives
The Mutants release the Lunataks, who immediately begin looting Thundrillium and taking slaves from the local villages.
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Episode 8
Aired Sep 17, 1986
Mumm-Ra Lives
The Thundercats build the Tower of Omens to monitor for new enemies; Ma-Mutt spies on the Thundercats disguised as a Berbil.
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Episode 9
Aired Sep 18, 1986
Mumm-Ra Lives
Mumm-Ra's power is restored; Snarfer makes it to Third-Earth but crashes in the Lunataks land where it becomes a race to find him.
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Episode 10
Aired Sep 19, 1986
Mumm-Ra Lives
In searching for the Lunataks flying fortress Sky Tomb, the Thundercats discover that Mumm-Ra is alive again and more powerful than ever.
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Episode 11
Aired Sep 22, 1986
Catfight
Mumm-Ra creates dissent within the ranks of the Thundercats by transforming into Jaga, causing them to fight each other.
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Episode 12
Aired Sep 23, 1986
Psych Out
The Lunatak Alluro uses a powerful talisman to take away the Thundercats' self-confidence, leaving them hopeless and confused.
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Episode 13
Aired Sep 24, 1986
The Mask of Gorgon
Mumm-Ra plans on using the legendary Mask of Gorgon to turn the Thundercats into stone.
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Episode 14
Aired Sep 25, 1986
The Mad Bubbler
Negative forces in a remote cave on Hook Mountain seep into the souls of the Lunataks and the Thundercats.
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Episode 15
Aired Sep 26, 1986
Together We Stand
Mumm-Ra summons the Berserkers and sends them to attack the Thundercats at the Tower of Omens.
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Episode 16
Aired Sep 29, 1986
Ravage Island
On Ravage Island, Mumm-Ra oversees the Mutants' gathering of magic crystals to fuel the Beacon of Ravage Island, a beam of light which has mind-controlling powers.
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Episode 17
Aired Sep 30, 1986
Time Switch
Tygra and Lion-O hoist an old suspension capsule left over from the ThunderCat arrival on Third Earth; but when the capsule slips and shatters on the ground, it releases suspension gases within the capsule.
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Episode 18
Aired Oct 1, 1986
The Sound Stones
Vultureman discovers a map which outlines the route to the legendary Sound Stones of Darkside; He asks the Mutants to help him steal the stone so he can make a sonic weapon and defeat the ThunderCats.
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Episode 19
Aired Oct 2, 1986
Day of the Eclipse
Every 100 years, Third Earth experiences a full eclipse, during which Mumm-Ra can cast any spell which will last until the next eclipse; Mumm-Ra casts the Day of Decay spell on the ThunderCats.
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Episode 20
Aired Oct 3, 1986
Sideswipe
As Snafer goes to the Berbil Village to get Mexican take-out, Chilla side swipes his ship and ices it; the ThunderCats decide to serve Chilla with an arrest warrant.
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Episode 21
Aired Oct 6, 1986
Mumm-Rana's Belt
A tale from long ago on Third Earth; Mumm-Rana and evil Queen Luna battled for possession of a Magic Belt.
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Episode 22
Aired Oct 7, 1986
Hachiman's Honor
Luna tricks Hachiman into helping her by claiming that her tiny size and physical weakness prevent her from returning home during a Third Earth Storm; Hachiman carries her to the Ice Cave.
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Episode 23
Aired Oct 8, 1986
Runaways
Feeling useless and unwanted, the ThunderKittens run away and mistakenly eat poisonous Brankenberries.
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Episode 24
Aired Oct 9, 1986
Hair of the Dog
Alone at Cats' Lair, Lion-O and Snarf are spied upon by Mumm-Ra and Ma-Mutt; when Snarf leaves the Lair, Ma-Mutt captures him and transforms himself into Snarf.
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Episode 25
Aired Oct 10, 1986
Vultureman's Revenge
Vultureman creates the Thundranium Field Projector which will project a field of Thundranium to weaken the ThunderCats.
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Episode 26
Aired Oct 13, 1986
ThunderCubs
A mysterious astronomical phenomenon starts to reform the ThunderCats' home planet ThunDERa; Among the debris is the legendary Sword of Plundarr, which caused the destruction of ThunDERa years before.
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Episode 27
Aired Oct 14, 1986
ThunderCubs
Lynx-O and the ThunderKittens are captured by Tug Mug and Red Eye at the Tower of Omens.
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Episode 28
Aired Oct 15, 1986
ThunderCubs
Mumm-Ra finds the Sword of Plundarr and discovers the secrets needed to destroy the ThunderCats once and for all.
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Episode 29
Aired Oct 16, 1986
ThunderCubs
The ThunderCats are helpless as Mumm-Ra escapes with their treasure and heritage.
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Episode 30
Aired Oct 17, 1986
ThunderCubs
With the Sword of Plundarr, Mumm-Ra is nearly undefeatable; but Lion-O finds a way to trick Mumm-Ra into striking the source of his evil powers.
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Episode 31
Aired Oct 20, 1986
Totem of Dera
Mumm-Ra's evil servant, the Wraith, returns from ThunDERa with the ancient healing artifact, the Totem of Dera.
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Episode 32
Aired Oct 21, 1986
Chain of Loyalty
Jaga warns Lion-O that the ThunderCats must retrieve the Chain of Loyalty from ThunDERa before it falls into evil hands.
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Episode 33
Aired Oct 22, 1986
Crystal Canyon
The Luna-Taks have recovered the Treasure of ThunDERa and are hiding it in the Crystal Canyon.
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Episode 34
Aired Oct 23, 1986
The Telepathy Beam
Vultureman joins forces with the Luna-Taks to capture Panthro; together they build the telepathic beam projector, a machine capable of masking Cheetara's sixth sense.
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Episode 35
Aired Oct 24, 1986
Exile Isle
Luna-Taks kidnap the ThunderKittens; the ThunderCats rescue ThunderKittens and capture Luna-Taks; the ThunderCats then sentence the Luna-Taks to exile on Exile Island.
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Episode 36
Aired Oct 27, 1986
The Key to Thundera
Lion-O is frustrated deciphering the hieroglyphics in the Book of Omens, when Snarf suggests using the Sword of Omens as a magnifying glass.
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Episode 37
Aired Oct 28, 1986
Return of the ThunderCubs
the Ancients grow impatient with Mumm-Ra's repeated failures and diagram a plan for him to claim the Treasure of ThunDERa; He must trick Cheetara into revealing the information.
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Episode 38
Aired Oct 29, 1986
The Formula
Aluro has invented a supercharged fuel that finally gives the SkyTomb the ability to reach the new ThunDERa.
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Episode 39
Aired Oct 30, 1986
Locket of Lies
Mumm-Ra retrieves the ancient artifact, the Locket of Lies; Mumm-Ra uses it to lure the ThunderCats into a concealed pit-trap.
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Episode 40
Aired Oct 31, 1986
Bracelet of Power
Snarf accidentally discovers that the Bracelet of Power has the power to control the ThunderCats; gradually, he starts to coerce the ThunderCats to do his bidding.
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Episode 41
Aired Nov 3, 1986
The Wild Workout
Following up on a rumor, the ThunderCats take the Feliner to ThunDERa where supposedly a piece of the treasure of ThunDERa lies within the Caverns of Cold; Mumm-Ra watches them in his cauldron.
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Episode 42
Aired Nov 4, 1986
The Thunderscope
Snarf discovers an ancient Thundarian artifact, the Thunderscope, amid the wreckage of the ThunderCats' original spaceship; the object has the power to immediately identify any object of Thundarian origin.
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Episode 43
Aired Nov 5, 1986
The Jade Dragon
Mumm-Ra's mentors, the Ancient Spirits of Evil, threaten to relinquish Mumm-Ra's rule over Third Earth if he fails to destroy the ThunderCats; the spirits describe an ancient artifact called the Drag.
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Episode 44
Aired Nov 6, 1986
The Circus Train
Wilykat is hypnotized and stows away with Captain Bragg, a bounty hunter who poses as the leader of a traveling circus.
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Episode 45
Aired Nov 7, 1986
The Last Day
Mumm-Ra has until sundown to destroy the ThunderCats or the Ancient Spirits will banish him from Third Earth forever.
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Episode 46
Aired Nov 10, 1986
Return to Thundera
With Mumm-Ra banished form Third Earth, the ThunderCats return to their home planet ThunDERa; the Ancient Spirits decide to give Mumm-Ra one last chance to destroy the ThunderCats.
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Episode 47
Aired Nov 11, 1986
Return to Thundera
Despite its unstable environment, the ThunderCats are determined to stay on the new ThunDERa; Mumm-Ra summons Grune the Destroyer to help him destroy the ThunderCats.
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Episode 48
Aired Nov 12, 1986
Return to Thundera
Enraged by his failure to destroy the ThunderCats, Mumm-Ra returns to the Great Beneath as Jaga the Wise.
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Episode 49
Aired Nov 13, 1986
Return to Thundera
Knowing he cannot defeat both Tygra and Punyra on Third Earth and the ThunderCats on the new ThunDERa, Mumm-Ra orders Ma-Mutt to rescue the Mutants from Captain Bragg.
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Episode 50
Aired Nov 14, 1986
Return to Thundera
Mumm-Ra realises he must destroy the new ThunDERa in order to destroy the ThunderCats, so he travels to the Great Beneath and blasts the gyroscope into rapid decay.
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Episode 51
Aired Nov 17, 1986
Leah
The Ancient Spirits of Evil provide Mumm-Ra with a Mirror Wraith, which can take the form of any shape and travel through space using mirrors as portals.
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Episode 52
Aired Nov 18, 1986
Frogman
As reconstruction of the new ThunDERa continues, the ThunderKittens drill a water well, where they not only hit water but release an amphibian-like creature with green skin.
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Episode 53
Aired Nov 19, 1986
The Heritage
Wilykat and Wilykit discover the Golden Sphere of Setti, an ancient artifact that once belonged to Mumm-Ra; the sphere magnifies his power by four, making him more powerful than the Ancient Spirits.
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Episode 54
Aired Nov 20, 1986
Screw-Loose
When Jagara loses control of gyroscope, the ThunderCats bring in a robot named Screw-Loose to help.
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Episode 55
Aired Nov 21, 1986
Malcar
The ThunderCats must use all of their supplies of Thundrillium to reach a distressed spaceship.
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Episode 56
Aired Nov 24, 1986
Helpless Laughter
An astronomical line-up of the five Thundarian moons causes a serious drought on the new ThunDERa; Panthro and Snarf take the ThunderTank to collect the remaining water of Dreary Canal.
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Episode 57
Aired Nov 25, 1986
Cracker's Revenge
Captain Cracker attacks bounty hunter Captain Bragg, who is holding the exiled Luna-Taks prisoner, and frees the Luna-Taks in order to have them help him return Third Earth to a pirate's paradise.
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Episode 58
Aired Nov 26, 1986
The Mossland Monster
Tygra gets caught in a meteor shower while returning from Third Earth; losing control of the Feliner, he crashes through the atmosphere into the unexplored Mosslands of New ThunDERa.
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Episode 59
Aired Nov 27, 1986
Ma-Mutt's Confusion
Mumm-Ra unveils his latest weapon, the Babylonian Barbarian Boiler, to destroy the ThunderCats; the Boiler emits a beam that rapidly melts anything it touches.
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Episode 60
Aired Nov 28, 1986
Shadowmaster
A rare lunar eclipse casts an eerie pale over the new ThunDERa; eclipse opens a portal where the exiled Shadowmaster contacts the Ancient Spirits of Evil.
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Episode 61
Aired Dec 1, 1986
Swan Song
The ThunderCats prepare for a visit from the Ecology Inspector; the Inspector hopes to enlist the aid of the ThunderCats in capturing Two-Time, an intergalactic land poacher.
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Episode 62
Aired Dec 2, 1986
Touch of Amortus
Amortus, an evil tentacled creature banished eons ago by the Thunderians, has returned to the new ThunDERa through Mumm-Ra's cauldron.
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Episode 63
Aired Dec 3, 1986
The Zaxx Factor
Vultureman hijacks a space bookmobile to escape Captain Bragg's Circus Train; on board, he learns of the powerful Rosencranz Medallion that once belonged to Mumm-Ra's arch rival Zaxx.
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Episode 64
Aired Dec 4, 1986
Well of Doubt
The ThunderCats build a homing beacon tower just in time to guide a group of Thundarian refugees back to the planet.
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Episode 65
Aired Dec 5, 1986
The Book of Omens
The ThunderCats finally open the Book of Omens; the Guardian of the Book explains that the ancient artifacts they have gathered must be presented at four different locations.
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