The WORST episodes of ThunderCats Roar

Every episode of ThunderCats Roar ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of ThunderCats Roar!

Staying true to the premise of the original series: Lion-O and the ThunderCats — Tygra, Panthro, Cheetara, Wilykat and Wilykit — barely escape the sudden destruction of their home world, Thundera, only to crash land on the mysterious and exotic planet of Third Earth. Lion-O, the newly appointed Lord of the ThunderCats, attempts to lead the team as they make this planet their new home. A bizarre host of creatures and villains stand in their way, including the evil Mumm-Ra, Third Earth’s wicked ruler who will let nothing, including the ThunderCats, stop his tyrannical reign over the planet.

Last Updated: 11/21/2024Network: Cartoon NetworkStatus: Ended
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Swampy Johnny
star
5.75
4 votes

#1 - Swampy Johnny

Season 1 - Episode 45 - Aired 11/13/2020

The Thundercats invite a super cool swamp man into the Cat's Lair who is on the run from some scary looking aliens!

Directors: Keith Pakiz
Writer: Joan Ford
Watch Now:Amazon
Claudus
star
6.00
3 votes

#2 - Claudus

Season 1 - Episode 38 - Aired 11/6/2020

Lion-O's dad King Claudus arrives on Third Earth, and turns out to be a big selfish jerk! Now Lion-O has to deal with his dad before he goes to war with the rest of the Thundercats.

Watch Now:Amazon
Schnorp
star
6.00
3 votes

#3 - Schnorp

Season 1 - Episode 33 - Aired 11/4/2020

The Thunderkittens plug a new video game cartridge into Snarf only to learn that it didn't load a game, it loaded a whole new personality into their pal! Meet Schnorp, a kind Swedish man who loves the beauty of nature and collecting berries! Schnorp is loads of fun, but we're gonna want Snarf back, right?

Watch Now:Amazon
Tygra's Garden
star
6.33
3 votes

#4 - Tygra's Garden

Season 1 - Episode 46 - Aired 11/16/2020

Tygra says he's done being a Thundercat after he gets engaged to a sentient flower. Now it's up to Lion-O to break up the wedding!

Watch Now:Amazon
Mall-Ra
star
6.33
3 votes

#5 - Mall-Ra

Season 1 - Episode 40 - Aired 11/9/2020

Mumm-Ra builds a mall that's actually a giant labyrinth designed to trap the Thundercats forever. Too bad the Thundercats love the mall so much they could literally spend all eternity there.

Writer: Joan Ford
Watch Now:Amazon
The First Thundsgiving
star
6.50
4 votes

#6 - The First Thundsgiving

Season 1 - Episode 51 - Aired 11/21/2020

Tygra is furious after the other Thundercats eat the last of his Thunderian ingredients. To make it up to him they go hunting for substitutes on Third Earth to show him the food on their new planet is just as delicious as the food they had back on their old home.

Directors: Keith Pakiz
Watch Now:Amazon
Plundsmas
star
6.50
4 votes

#7 - Plundsmas

Season 1 - Episode 48 - Aired 11/18/2020

The Mutants refuse to celebrate their favorite holiday, Plunds-Mas, now that Plun-Darr is gone. So now it's up to the Thundercats to raise their spirits by enacting the eight horrors of Plunds-Mas!

Directors: Keith Pakiz
Writer: Joan Ford
Watch Now:Amazon
Mini Mongor
star
6.50
2 votes

#8 - Mini Mongor

Season 1 - Episode 44 - Aired 11/12/2020

The Thunderkittens unleash a demon who is powered by fear. Too bad he's small and not that scary.

Directors: Megan Boyd
Watch Now:Amazon
Eclipsorr
star
6.67
3 votes

#9 - Eclipsorr

Season 1 - Episode 41 - Aired 11/10/2020

Third Earth's sun is being blocked out by the Eclipsor Corporation, an amoral company that wants to sell its energy for a profit. The ThunderCats can't do anything about it because they don't have a spaceship, yet!

Directors: Jeremy Polgar
Watch Now:Amazon
Corporate Buyout
star
6.67
3 votes

#10 - Corporate Buyout

Season 1 - Episode 31 - Aired 11/3/2020

The Cheetara Corp employee retreat gets canceled when Baron Karnor, a mysterious corporate raider, buys them out! Now Cheetara and Jan-Jan must brave the wilds of Third Earth's most dangerous jungles to find the Baron's office and demand a meeting with the man who stole their company!

Directors: Keith Pakiz
Watch Now:Amazon
Hachiman
star
6.67
3 votes

#11 - Hachiman

Season 1 - Episode 32 - Aired 11/3/2020

While on a super important mission to get batteries for the TV remote Lion-O meets Hachiman, a cool Samurai warrior. Now Lion-O will do anything to prove he's just as cool as Hachiman, even if it means risking his own life!

Watch Now:Amazon
Berb-cules
star
6.67
3 votes

#12 - Berb-cules

Season 1 - Episode 34 - Aired 11/4/2020

The ThunderCats finally sit the Berbils down and tell them they really shouldn't be building things for the Mutants anymore, it's time for the Berbils to stand up for themselves. The Berbils take this advice way too far and build a giant, building-sized, Berbil named Berbcules. Berb-cules takes back everything the Berbils ever built for the Mutants and everything they ever built for the ThunderCats! Now Panthro has to figure out a way to a defeat the most powerful invention the best little builders have ever built!

Directors: Jeremy Polgar
Watch Now:Amazon
The Space Beam
star
6.67
3 votes

#13 - The Space Beam

Season 1 - Episode 47 - Aired 11/17/2020

The new rulers of Plun-Darr say they'll bring one of the Mutants home; whichever one of them activates a homing beacon that will blow up the Thundercats. Now it's every Mutant for themselves as they battle it out to be the one to activate the beacon!

Directors: Megan Boyd
Watch Now:Amazon
Killing Time
star
6.67
3 votes

#14 - Killing Time

Season 1 - Episode 49 - Aired 11/19/2020

Mumm-Ra, the Ever-Living decides he'll nap for a thousand years, till the Thundercats are long gone. But when he wakes up, he's shocked to discover that Third Earth is even more in love with them than ever.

Watch Now:Amazon
Grune
star
6.67
3 votes

#15 - Grune

Season 1 - Episode 50 - Aired 11/20/2020

The ThunderCats face the greatest threat of their lives: Grune the Destroyer! He's the ghost of an evil ThunderCat and he wants revenge! How are They Gonna Beat Grune??? You'll have to watch the episode!

Directors: Megan Boyd
Watch Now:Amazon
star
6.67
3 votes

#16 - Mandora Saves Christmas

Season 1 - Episode 52 - Aired 12/5/2020

Santa Claus is on the run from Mandora! Can the Thundercats help him get off Third Earth without getting caught? And can Santa Claus teach them a little something about this weird new holiday "Christmas"?

Directors: Keith Pakiz
Writer: Joan Ford
Watch Now:Amazon
ThunderDogs
star
7.00
3 votes

#17 - ThunderDogs

Season 1 - Episode 43 - Aired 11/11/2020

The Thundercats agree to foster a demonic puppy from the Astral Plane until they can find it the perfect owner. But could the perfect owner be their worst enemy? Their worst enemy is Mumm-Ra in case you forgot!

Watch Now:Amazon
Wizz-Ra
star
7.00
3 votes

#18 - Wizz-Ra

Season 1 - Episode 42 - Aired 11/10/2020

The ThunderCats freak out when a spooky ghost dressed like a pharaoh appears in their mirrors! They quickly set about to getting rid of every reflective surface in their lair, because that ghost is scary and no one wants to talk to him!

Directors: Keith Pakiz
Watch Now:Amazon
Telethon
star
7.00
3 votes

#19 - Telethon

Season 1 - Episode 39 - Aired 11/9/2020

In order to save the Berbils, Cheetara uses her psychic powers to project a telethon into the brains of everyone on Third Earth.

Directors: Jeremy Polgar
Watch Now:Amazon
Sword Heist
star
7.00
3 votes

#20 - Sword Heist

Season 1 - Episode 37 - Aired 11/6/2020

When a local sword shop sells an ultra powerful sword to Ratar-O, Lion-O decides he has to steal it before Ratar-O can come pick it up; unfortunately, Lion-O is against stealing.

Directors: Keith Pakiz
Watch Now:Amazon
King of the Machines
star
7.00
3 votes

#21 - King of the Machines

Season 1 - Episode 36 - Aired 11/5/2020

Panthro gets insecure when he finds out Barbastella has a history of dating royalty, so he tries to impress her by becoming "King of the Machines" and giving all the appliances in the Cats' Lair artificial intelligence.

Directors: Jeremy Polgar
Watch Now:Amazon
Thunder Road
star
7.00
3 votes

#22 - Thunder Road

Season 1 - Episode 30 - Aired 11/2/2020

When a crate containing fifty Swords of Omen lands on Third Earth, the ThunderCats rush out in the ThunderTank to find them. Unfortunately The Mutants and Mumm-Ra want those swords too so it's going to be a race to get to them! A wacky race, you might say. We won't say that, but you might.

Directors: Keith Pakiz
Watch Now:Amazon
Panthro Plagiarized!
star
7.25
12 votes

#23 - Panthro Plagiarized!

Season 1 - Episode 7 - Aired 3/14/2020

Vultureman has got a brand new invention but there's one big problem: he stole the idea from Panthro! Oh, also Vultureman is using his invention to take over Third Earth. So, there are two big problems.

Directors: Jeremy Polgar
Watch Now:Amazon
Pumm-Ra
star
7.33
3 votes

#24 - Pumm-Ra

Season 1 - Episode 35 - Aired 11/5/2020

Mumm-Ra plans to disguise himself as a Thunderian and infiltrate Cats' Lair, but the Ancient Spirits of Evil are mad at him and won't give him any magic today. No matter, Mumm-Ra knows what a ThunderCat looks like so he slaps on some awful, unconvincing, cat make up and heads to Cats' Lair to introduce himself!

Watch Now:Amazon
Mandora's Law
star
7.33
3 votes

#25 - Mandora's Law

Season 1 - Episode 29 - Aired 11/2/2020

Tygra creates a bunch of new laws for Third Earth so Mandora can finally arrest the Mutants. Unfortunately the Thundercats are really bad at following their own rules and the Mutants are really good at working around them.

Directors: Jeremy Polgar
Watch Now:Amazon