List of ThunderCats Episodes - Season 1 (1985)

Season 1 (1985)

Title Writer Original airdate Production code #
Berbils Leonard Starr September 11, 1985 3 3
While out exploring, Lion-O and Snarf are taken prisoner by a band of small robotic bears named Ro-Bear Berbils. They soon learn that the Berbils are being frequently attacked by the Trolligs who steal their fruit to give to the Giantorrs.
The Slaves of Castle Plun-darr Leonard Starr September 12, 1985 4 4
Cats Lair is nearly complete when an agitated Wilykit and Wilykat rush home to tell the other ThunderCats that the Mutants have enslaved a race of creatures called Brute Men to build their new fortress. Tygra tells the twins to stay behind as the adult ThunderCats rush off to free these peaceful creatures.
Pumm-Ra Julian P. Gardner September 13, 1985 5 5
Mumm-Ra disguises himself as a Thunderian and claims to have rescued Cheetara from the mutants.
The Terror of Hammerhand Ron Goulart and Julian P. Gardner September 16, 1985 6 6
Snarf frees a unicorn from mechanized Viking berserkers who are out hunting for food.
Trouble with Time Ron Goulart and Julian P. Gardner September 17, 1985 7 7
The mutants are looking for a "feminine touch" around Castle Plundar and attempts to capture natives of the 3rd Earth. Willa and her sister fights off Monkian, but both of them are cautious of the aliens (i.e. Thundercats & the Mutants). Lion-O also takes the Thundertank for a "shortlived" joyride. Whilst looking for Thundrylium in a cave Tygra begins to age at an accelerated rate.
The Tower of Traps Leonard Starr September 18, 1985 8 8
In search of a piece of stolen jewellery, Wilykat becomes a prisoner locked up in a tower as Lion-O and Wilykit must find their way to him through a maze of booby traps.
The Garden of Delights Barney Cohen and Julian P. Gardner September 19, 1985 9 9
Mumm-Ra drugs Tygra and uses him against his fellow ThunderCats to steal the Sword of Omens making them vulnerable as Mumm-Ra soon takes them prisoner.
Mandora - The Evil Chaser William Overgard September 20, 1985 10 10
Lion-O finds what looks like a spaceship's escape pod, he opens it and inadvertently releases galactic convicts.
The Ghost Warrior Leonard Starr September 23, 1985 11 11
Two Bulkans release the ghost of Grune the destroyer from his tomb, he seeks a final battle with Jaga.
The Doom-Gaze Stephen Perry September 24, 1985 12 12
The ancients spirits of evil instruct Mumm-Ra to release an ancient princess who has the power to mesmerise males with her gaze.
Lord of the Snows Bob Haney September 25, 1985 13 13
A meteor of pure Thundrylium crashes into the remote Hook mountain. When Lion-O goes after it, he finds himself face to face with a man of the mountain whom he must fight. This is also the first appearance of Vultureman.
The Spaceship beneath the Sands Leonard Starr September 26, 1985 14 14
After repeated defeats the mutants ask Mumm-Ra to return their ship which he buried in the desert around his pyramid. Once it is resurfaced, they have new weapons to use against the ThunderCats.
The Time Capsule Peter Lawrence September 27, 1985 15 15
The ThunderCats decide it is time to search for their time capsule from Thundera which has been missing since the crash.
The Fireballs of Plun-Darr William Overgard September 30, 1985 16 16
The warrior women's village is attacked by Fireballs from a new weapon inside Castle Plun-Darr. When Tygra goes to investigate, he is captured and locked into a device which will rip him apart by pulling out his four limbs.
All That Glitters Bob Haney October 1, 1985 17 17
Mumm-Ra tricks Lion-O and Tygra into fighting each other which causes the Sword of Omens to break. In order to repair it the ThunderCats seek the help of a being whose powers are derived from bathing in liquid gold.
Spitting Image Howard Post October 2, 1985 18 18
After the driller captures Panthro, Mumm-Ra creates an evil clone of him to turn the people of Third Earth against the ThunderCats.
Mongor Peter Lawrence October 3, 1985 19 19
While exploring, the ThunderKittens stumble across an old temple where their curiosity gets the best of them and they release a demon. It's a goat-like creature who gets more powerful as others fear him. It's up to the Thundercats to find a way to overcome their fears and defeat this monster.
Return to Thundera Bob Haney October 4, 1985 20 20
The Mutants unleash a new invincible war robot while Lion-O accidentally travels back in time to Thundera after the eye of Thundera reacts with the Thunderian time capsule. There he meets his father, Claudius, who gives him a scroll containing a Mutant secret.
Dr. Dometone William Overgard October 7, 1985 21 21
A frog robot swallows Wilykit. It turns out to be piloted by Dr. Dometome the scientist responsible for maintaining the ocean's plug which stops the ocean draining into the Earth's core.
The Astral Prison Peter Lawrence October 8, 1985 22 22
Jaga is imprisoned within the astral plane for eternity. Lion-O must journey there to release him, however there is no way for him to return.
The Crystal Queen Leonard Starr October 9, 1985 23 23
A rare and beautiful bird is captured by the Queen of a crystal kingdom.
Safari Joe Stephen Perry October 10, 1985 24 24
Safari Joe comes to Third Earth looking for prey 'worthy' of being hunted. He begins hunting the ThunderCats.
Snarf Takes up the Challenge Peter Lawrence October 11, 1985 25 25
After the ThunderCats are captured by Mumm-Ra, it is up to Snarf to save them.
Sixth Sense Peter Lawrence October 28, 1985 26 26
A ship in trouble tries to ask the ThunderCats for help using Cheetara's sixth sense. It ends up taking control of Cheetara and putting her life in danger as the mutants attack it.
The Thunder-Cutter William Overgard October 29, 1985 27 27
Mumm-Ra summons Haichiman a samurai from ancient times, and tells him the ThunderCats are evil invaders. Haichiman sets out to destroy them.
The Wolfrat C.H. Trengove October 30, 1985 28 28
Vultureman builds an infiltration robot and Mumm-Ra arms it with miniturisation gas which then shrinks the ThunderCats. They must rely on a normal size Snarf to help them defeat the robot.
Feliner - Part 1 Stephen Perry October 31, 1985 29 29
Vultureman summons Rattaro and his Ratstar battleship who kidnaps Snarf's nephew Snarfer on the planet of Snarfs. They then bring Snarfer back to Third Earth and use him as bait to trap the ThunderCats.
Feliner - Part 2 Stephen Perry November 1, 1985 30 30
The ThunderCats race to try to salvage the part they need for the Feliner from the wreck of the Ratstar before the mutants can complete repairs. Snarf contemplates leaving the Thundercats forever.
Mandora and the Pirates William Overgard November 4, 1985 31 31
Mandora boards a space freighter for inspection, it turns out to be the ancient space pirate ship the Jolly Rogers and she needs Lion-O's help.
Return of the Driller Howard Post November 5, 1985 32 32
Mumm-Ra instructs the Driller to bore a tunnel from an acid lake to the Cats Lair. It's a race to save the Lair as they face obstacle after obstacle while trying to obtain and bring back a sponge cloud to fill the hole.
Dimension Doom Bob Haney November 6, 1985 33 33
Wizz-Ra returns from the 7th dimension once every 7000 years, this time he enters Cat's Lair through a mirror in Cheetara's room. Mumm-Ra, his ancient enemy, is able to steal his magic helmet. He then enslaves the Thundercats and only Cheetara and Snarf are left to help their new friend before his time runs out.
Queen of 8 Legs Stephen Perry November 7, 1985 34 34
In the kingdom of webs a new queen is born, Mumm-Ra lures Lion-O to the kingdom and the spiders trap him.
Sword in a Hole William Overgard November 8, 1985 35 35
The ThunderCats respond to a space liner's SOS only to be captured by mercenaries on Mumm-Ra's pay. The Sword of Omens is cast into a black hole.
The Evil Harp of Charr-Nin Douglas Bernstein and Denis Markell November 11, 1985 36 36
Wilykit and Wilykat find a magic harp containing a genie. Mumm-Ra offers to free the genie if he helps to destroy the ThunderCats.
*Lion-O's Anointment First Day: Trial of Strength Leonard Starr November 12, 1985 37 37
Snarf tells Lion-O that he must earn his title as Lord by completing five trials, the first of which will be to defeat the mighty Panthro.
The Demolisher Bob Haney and Peter Lawrence November 13, 1985 38 38
A bored galactic conqueror comes to Third Earth to battle Mumm-Ra. After defeating Mumm-Ra and hearing of the ThunderCats power he rushes off to battle Lion-O.
Monkian's Bargain Lee Schneider November 14, 1985 39 39
Monkian makes a deal with Mumm-Ra to give him power orbs whatever the cost.
Tight Squeeze Stephen Perry November 15, 1985 40 40
After a disagreement Vultureman leaves castle Plun-darr and destroys all the mutants technology. Slithe is forced to ask Mumm-Ra to take away the ThunderCats' weapons which he seals within the sword chamber so that the ThunderCats cannot reach them.
The Micrits Bruce Smith November 18, 1985 41 41
Lion-O is captured by very small creatures who see him as a threat to their village, and disable Cats Lair and the Thundertank. The Mutants seize the opportunity and wreak havoc on the other Thundercats who do not know where Lion-O is.
*Lion-O's Anointment Second Day: The Trial of Speed Leonard Starr November 19, 1985 42 42
Lion-O must beat Cheetara in a race to pass the second anointment trial.
The Rock Giant Peter Lawrence November 20, 1985 43 43
Mumm-Ra awakens a monster made of rocks to defeat the ThunderCats.
Jackalman's Rebellion Bruce Smith November 21, 1985 44 44
Jackalman forms his own army and steals weapons from the Mutants.
Turmagar the Tuska C.H. Trengove November 22, 1985 45 45
A strange traveller crash lands next to Cats Lair, he enlists the ThunderCat's help to battle a war machine.
*Lion-O's Anointment Third Day: Trial of Cunning Leonard Starr November 25, 1985 46 46
Lion-O must outwit Wilykit and Wilykat in the Maze of Infinity but there are more than ThunderKittens lurking about who are ready to stop him.
The Mumm-Ra Berbil Jeri Craden November 26, 1985 47 47
Mumm-Ra disguises himself as an injured Ro-Bear Berbil to infiltrate Cats Lair.
Mechanical Plague Peter Lawrence November 27, 1985 48 48
Mumm-Ra takes advantage of the ThunderCats being separated as they make their own home movies. He summons the greatest mechanical adversaries in an attempt to destroy them.
Trapped Stephen Perry November 28, 1985 49 49
Sheltering from a storm inside an old Suspension Capsule, Wilykit and Wilykat become trapped. Things take a turn for the worse when the Mutants find out about it.
*Lion-O's Anointment Fourth Day: The Trial of Mind Power Leonard Starr November 29, 1985 50 50
Lion-O must overcome Tygra's mental powers and face his greatest fear.
Excalibur Peter Lawrence December 2, 1985 51 51
Mumm-Ra takes the form of King Arthur in order to claim the greatest sword of all time, Excalibur so that he can finally destroy the Sword of Omens.
Secret of the Ice King Bob Haney December 3, 1985 52 52
An Ice King who has been frozen for 1,000 years is suddenly awakaned and is wreaking havoc on Hook Mountain.
Good and Ugly Peter Lawrence December 4, 1985 53 53
Two aliens arrive in spaceships and fight near Cats Lair and Lion-O must learn a lesson about first impressions.
The Transfer Lawrence DuKore and Lee Schneider December 5, 1985 54 54
An unknown ship containing a dangerous radioactive device approaches Third Earth.
Divide and Conquer Lee Schneider December 6, 1985 55 55
Vultureman creates a voice imitator and the Mutants use it to trick the ThunderCats into splitting up to trap and destroy them.
Dream Master Heather Winters and Annabelle Gurwitch December 9, 1985 56 56
Mumm-Ra assumes the form of a Dream Master to take control of the ThunderCats unconscious selves.
Out of Sight C.H. Trengove December 10, 1985 57 57
Willa is captured by the mutants so Tygra makes himself and Nayda invisible to infiltrate castle Plun-darr not knowing the consequences.
The Mountain Danny Peary December 11, 1985 58 58
Out of sheer boredom Lion-O climbs a mountain. The mutants decide to attack putting themselves and the ThunderCats in danger.
The Superpower Potion C.H. Trengove December 12, 1985 59 59
Vultureman creates a potion that grants the drinker super powers.
Eye of the Beholder Kenneth E. Vose December 13, 1985 60 60
The ThunderCats create a fake Sword of Omens and use it to trick the mutants, the plan backfires when Snarf is captured.
*Lion-O's Anointment Final Day: The Trial of Evil Leonard Starr December 16, 1985 61 61
Lion-O must defeat his greatest enemy, Mumm-ra, to complete the trials.
The Trouble with ThunderKittens Kimberly B. Morris December 17, 1985 62 62
Eager to prove that they are old enough for adult weapons, Wilykit and Wilykat sneak off with the adult Thundercats weapons for some practice. The Mutants seize an opportunity and the kids escape, but the weapons are now in the hands of the Mutants and the kids will have to confess to Lion-O what they did to gain his help in retrieving them.
Mumm-Rana Bob Haney December 18, 1985 63 63
After a space battle the Mutants' escape pods land next to a white pyramid. Inside they meet Mumm-Rana who is the good equivalent of Mumm-Ra. Mumm-Ra arrives and takes control of her to use her power against the ThunderCats.
The Shifter Matthew Malach December 19, 1985 64 64
Vultureman builds a device that switches the consciousness of two beings and takes aim at the ThunderCats.
Fond Memories Lee Schneider December 20, 1985 65 65
Mumm-Ra creates a 'living' museum of the ThunderCats' greatest enemies and traps Lion-O. But his most formidable enemy is one he's not yet fought.

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