The Turtles meet April O'Neil for the first time. Splinter explains the origins of himself and the Turtles.

The Turtles find out about the Technodrome and try to find it. Splinter finds the Technodrome and ends up getting kidnapped by Shredder. When the Turtles find the Technodrome, Shredder tells the Turtles who is responsible for covering them in the ooze that mutated them.

A scientist named Baxter Stockman has created a robot meant for hunting rats, called Mouser. Shredder mass produces the robot and programs them to hunt the biggest rat in New York - Splinter. Shredder wants Baxter dead because he knows too much. Michaelangelo finds out about Krang.

The Turtles take over what's left of Baxter Stockman's equipment, to help them track Shredder and the Technodrome and create the turtle Van. Shredder opens a portal to Dimension X in hopes to obtain new weapons. Instead, The Nutrinos - three teenage hot-rodders, and two of Krang's militant Stone Warriors, General Traag and one soldier, come through.

Shredder creates a retro-mutagen gun that can undo any mutation and dares the Turtles to come get it. As Donatello tries to create a fuel source for the vehicle that The Nutrinos left behind, Splinter and the Turtles eventually make their way to the Technodrome just in time to discover Krang in his new body.

Shredder returns from Dimension X and sets out to frame the turtles with a group of thugs dressed as them while Dr. Baxter Stockman uses the Ultimate Rat Catcher on Master Splinter.

The turtles seek out the fragments of the eye of Sarnoth, a crystal with unimaginable power. After finding the first fragment, Shredder steals it and uses it to shrink the turtles. Now Splinter and April must intervene. April is able to enlarge the Turtles, but our heroes lose in the end as Shredder escapes with the first fragment.

After discovering that a mutant plant has had its growth accelerated by the first fragment of the Eye of Sarnoth, Shredder unleashes it on the city to attack the Turtles.

Upon finding the second fragment of the Eye of Sarnoth, Shredder uses it as a power source for a supercomputer named Omnis, in the hopes of opening a portal to Dimension X. Meanwhile, the Turtles must deal with machines that suddenly go haywire all over the city.

Shredder completes the eye of Sarnoth, attaches it to his helmet, and plans to unleash its power on the world. However, when the Turtles intervene, the helmet falls into other hands.

Shredder & Baxter Stockman switch meatballs on some pizzas, used as prizes in a contest, with some weird alien eggs from Dimension X. The Turtles must battle the Xenomorph-like creatures that hatch from the eggs in order to save the city.

Shredder gets Bebop and Rocksteady back as his henchmen in exchange for Baxter. When Krang tries to exterminate him, a freak accident occurs turning him into a mutant fly.

The turtles deal with four mutant frogs who are now under Shredder's command and also deal with a group of anti-mutant enforcers.

Donatello devises a cure to make Master Splinter human again. Meanwhile, Shredder plans to open a gate to Dimension X.

A robot cop, Rex-1, helps April and the Turtles defeat an evil army of robot cops under the control of Shredder.

The Neutrinos return to Earth after hearing of Krang and Shredder's plan to get rid of the turtles via brain-drain. Shredder finds interest in their Starmobile's ability to open dimensional portals and tries to get his hands on it. Meanwhile, the turtles try to get the Starmobile's main energy source running again.

A freak accident from a transporter turns April into a cat-woman. Irma meets TMNT in order to rescue her.

While Splinter goes out on a retreat, the turtles must try to stop the Technodrome from returning to Earth.

The Turtles learn the cost of slacking off when Splinter is badly hurt during a confrontation with Shredder.

The intentions of the Ninja Turtles are put to the test when a controversial TV-figure portrays our heroes as menaces to society. The Turtles forego publicly clearing their name to defeat Krang and his new robotic weapon.

Irma accidentally becomes gigantic and her naturally clumsy nature makes her a danger to the city. The Turtles and April hide her and search for her cure.

Gangsters are swiping all the antiques in town. And when they swipe most of our heroes, it's up to Donatello and April to find out why. Could Shredder be behind this?

The Turtles go flying when the Shredder invents a gravity-altering device.

The personalities of Shredder and Splinter are switched when a device is accidentally activated during a battle between the Turtles and their enemies. As Shredder plans the Turtles' demise and Splinter plans on how to get back to his body, everyone else is clueless.

In the middle of a summer heat wave, someone is destroying all the air conditioners and taking all the city's freon. In the meantime, Vernon and Burne go looking for the Turtles, but find something else.

A 14-year-old boy tries his best to help out the Turtles, but with some not so optimal results. In the end, he proves himself to be a great asset to the Turtle team.

A mysterious, sewer-dwelling man has an unnatural ability to put rats under his control. Can Splinter resist, or will he destroy the Turtles at the bidding of the Rat King?

After witnessing a living dinosaur wander in the city and disappear abruptly, the Turtles follow its tracks into a large hole, where they discover a shocking revelation: A land frozen in a stage where dinosaurs roam the land.

Emperor Aleister of Malicuria comes to New York City, bringing along a shard of Lydium 90 to the USA.

A robot warrior, known as the Mobile Armored Computerized Combatant (M.A.C.C.), arrives from 400 years in the future in 20th-Century New York. He befriends the Turtles, but Shredder and Krang are looking to bring him to their side, at any means necessary.

Shredder gains possession of an ancient ninja sword that is crafted from an alien metal, allowing it to 'cut' through dimensions.

Krang and Shredder's plan to flush out the Turtles from the sewers leaves the city flooded with water (and creatures!) from the ocean.

Full of self doubt, Leonardo leaves the team. And his brothers all take turns being leader as they try to figure out why the sun is getting smaller.

A bump on the head leaves Leonardo thinking that he is in 17th century France, and that he and his comrades are Musketeers.

Shredder programs the city's new garbage collecting super-computer to collect the Turtles. But when Shredder doesn't specify 'Ninja' Turtles, the super-computer collects them all! Turtles of the city of every shape and size are not safe.

Shredder has an accident and ends up acting like Michelangelo. The episode has the Turtles dealing with him switching between his evil personality and Michelangelo, to hilarious consequences.

Aliens abduct Donatello and Rocksteady.

A visit to Earth from a Polarisoid results in havoc when Shredder (and later, April O'Neil) comes into possession of the alien's camera, because it does more than just take pictures.

Shredder and Krang engineer a love potion that makes Leonardo, Michelangelo, and Raphael all fall in love with Irma. Donatello races for an antidote before Shredder drains a naval submarine of all its power.

Baxter Stockman returns for revenge against the Turtles and Shredder, while our heroes attempt to stop Shredder's plan to siphon water from an underground reservoir.

An eager vigilante is causing a stir in the city, while Krang and Shredder take control of all the machines in the city. Maybe this new 'hero' can help the Turtles.

A train accident produces gallons of mutagen that drench nearby cattle. The result is a super bull with a temper!

White-collar criminals give new meaning to the term 'hostile take-over.' Casey Jones helps the Turtles uncover who's behind a new wave of corporate crime.

The Shredder opens a pizza parlor "Weird Pizza" in his latest scheme to catch the turtles. He intends to place a homing device disguised as an anchovy on a pizza, then as soon as the turtles call in with their order and the pizza is delivered, he will send an army of Foot Soldiers into their lair. All he needs is a delivery boy and he ends up hiring the most unlikely candidate: Michaelangelo. This hip turtle is looking for a job so he can buy a new belly board. Not knowing he's really working for Shredder, he jumps into action, and "borrows" the Nutrino Starcruiser. Things go further awry with the Rat King added to the mix.

Shredder and Krang produce hi-tech versions of Rocksteady and Bebop to keep the Turtles busy.

A skilled, and lovely, ninja warrior is hired by Krang to defeat the Turtles. Shredder's replaced, Leonardo's met his match.

Splinter suffers amnesia as the Turtles try to remind him that he is the true leader of the Foot Clan.

Our old friends, the Punk Frogs, are being terrorized by a mutant alligator in the Florida Everglades. Leatherhead teams up with Shredder to battle the Frogs and the Turtles.

It's Michelangelo's birthday, but none of his brothers seem to remember, and it frustrates him greatly. Meanwhile, Shredder and Krang discover what is possibly an "anti-mutagen" that, after testing it on three rock soldiers, can undo mutations. Shredder, Bebop and Rocksteady are sent to use it on the Turtles, and our heroes have a few close calls.

A rabbit ronin warrior from an alternate dimension is lost in our world. While the Turtles help him adjust, Shredder steals a dragon egg to unleash it on the city.

Someone is stealing all the kimonos in the city. After Master Splinter's favorite kimono is stolen, April's famous detective aunt helps the Turtles retrieve it.

Shredder tricks Usagi Yojimbo into battling the Turtles.

Even a case of Turtle Pox cannot stop our heroes from an attempt to take down Shredder and Krang after they unleash Metalhead, a robotic fighting machine programmed to seek and capture the Turtles.

Leatherhead heads to New York to get revenge on the Teenage Mutant Ninja Turtles. He runs into the Rat King instead, who has stolen a truckload of chemicals and plans to turn the citizens of New York into mindless zombies so his minions of rats can rule the city. With two of their most insidious foes in the same sewer, the Ninja Turles must work with April O'Neal to stop them both.

Irma is kidnapped by Bebop and Rocksteady and is replaced by a robot that looks just like her that is programmed to eliminate the turtles.

The Turtles must clear their names when they are believed to be jewel thieves who stole a priceless emerald during a magic act run by a wizard named Boldini.

Zach's big brother, Walt, steals a rare pouch containing the only map to the Turtles' lair.

Bebop and Rocksteady put on an act to get the Turtles to eat cookies, but not any ordinary cookies, because these cookies could turn them into humans!

Kala's pet Grybyx, which has a really bad temper whenever it gets hungry, escapes from Dimension X through a portal to Earth, causing trouble for the Turtles

An impish alien comedian from Dimension Z (who has mannerisms similar to Pee Wee Herman), escapes to Earth to cause big trouble for the TMNT.

The Turtles have entered an alternate universe in which they thought had never existed and The Shredder rules the city as Emperor.

An interdimensional alien spacecraft leads Baxter Stockman to his latest vengeful plot to destroy the Turtles and Shredder.

After several failed attempts to get the Technodrome re-energized, Shredder and Krang run one last-ditch distraction for the Turtles at Fort Charles while Bebop and Rocksteady steal energy fuel cells from the neighboring space research center.

The Technodrome is up and running again, and it is up to the Turtles to hinder Shredder and Krang from getting to the surface.

The Technodrome is up and running again, and it is up to the Turtles to hinder Shredder and Krang from getting to the surface.

With the Technodrome in serious need for new equipment, Bebop and Rocksteady are sent to Earth, disguised in human form, to capture the Channel 6 building and return it to Dimension X.

Still in Paris, the Turtles & Master Splinter visit the Louvre. Meanwhile, due to Shredder's incompetence, Krang's new Hyper Rocket Thruster becomes a Rust Encruster, with which he plans to oxidise the world's famous landmarks & monuments, unless world leaders use their power reserves to bring the Technodrome back to Earth

In the Austrian Alps, Krang plans to use his new invention to melt the Alpine glaciers, flooding the low-lying villages

A professor's new ray-gun causes plants to go wild and his pet ape Jocko to become a giant rampaging monkey. By using the same ray-gun, Donatello is increased to Jocko's size so he can fight the giant ape and save April from him

While trying to see the new toys at the Toy Fair, Michelangelo stumbles upon a plot to take over a noted toy company.

The Turtles must battle a reanimated Terracotta Army after Shredder steals an energy device shaped like a giant pearl, which is held and guarded by a Jade Dragon.

New York is in the middle of an induced heat wave caused by Shredder, who must battle the Turtles and deal with his mother, Miyoko Saki, at the same time.

When General Tragg and his troops attack the Neutrino capital, the Neutrino leaders, Zenter and Gizzla, send their infant daughter Tribble through a portal to Earth, asking the Turtles to look after her, but Tribble causes big trouble for our heroes.

J. Gordon Hungerdunger, a Texas millionaire, is holding a "best super-hero" contest. The winner of the contest will receive the humongous Malaprop Diamond. No one is aware of it, but Hungerdunger is using the contest as a diversion so that he can put a zombie-making chemical into the city's water supply. The malevolent millionaire figures that if he can get the citizens under his control, he can easily take over the city

The Turtles must save the Earth from a massive energy drain and its Apocalyptic result by traveling to another dimension where turtles are the dominant species.

A Technodrome computer disguised as an electronic keyboard ends up on Earth, and in the most unlikely of hands.

When a power surge causes an arcade machine to release Tempestra, It's up to Leonardo to stop her digital wrath before she becomes dangerously powerful

Gadget Man comes out of retirement after 50 years, but is tricked by Shredder into fighting against the Turtles.

Krang hires a multi-dimensional ring-master who intends on making the Teenage Mutant Ninja Turtles part of his circus by using an anti-aging serum.

The Turtles travel to a FairyTale Dimension in an attempt to save the city from Shredder's Docilizer, while also making friends with a local citizen of that dimension, Hokum Hare (based on the Hare character from "The Tortoise and the Hare").

Set up as a follow-up episode, Hokum Hare and the Turtles hitch a ride on a time-traveling train to 2036, where they discover that Shredder has plans for the future New York City. Ultimately, the Turtles of both the past and the future must team up to thwart Shredder before his actions cause all of time to be destroyed.

Vengeful Baxter Stockman and an A.I. computer return to Earth from a dimensional limbo and capture the Turtles while luring Shredder into their trap as well.

On their latest trip to Earth, Bebop and Rocksteady steal a machine that makes everyone scared of everything.

Bebop and Rocksteady use Krang's new Mutagen on Bebop's pet turtle Slash so he can do their housework for them. Slash runs away and is conned by an irritated entrepreneur into framing the TMNT.

After many failed attempts from his rodent subjects to find food, the Rat King learns of an abandoned canister of mutagen lost in the sewers and claims it for himself. Then, he kidnaps Irma and Vernon and uses the mutagen to transform them into his mutant slaves, for the sole purpose of raiding food warehouses. It is later discovered that the mutations are unstable and can only be active if the Rat King plays his hypnotic flute.

An alien called a "Zipp" is sent to Earth, but this little alien soon becomes a big problem.

Ninja Lotus Blossom's nightmares draw her to a strange artifact in the Turtles' possession. The artifact contains an angry spirit, whose wife's soul is within Lotus.

The world's richest man announces a contest for the greatest superhero. The winner will receive an enormous diamond. Shredder and Krang enroll Bebop and Rocksteady for the contest to win the diamond. The turtles are incredibly surprised when they meet superhero contestants like Cheeseburger Man, Newsman (aka Vernon) and Rhino-man (aka Rocksteady) with his sidekick Mighty Hawk (aka Bebop).

Michelangelo must babysit and protect a young rich girl named Buffy, who knows the formula for a super fuel that Krang needs for the Technodrome.

Shredder has a plan to destroy the Turtles, but with the Technodrome's portal out of commission, he is unable to challenge them on Earth, so he uses the Dimensional Teleporter to bring his enemies to Dimension X.

The Teenage Mutant Ninja Turtles are looking for some excitment. They soon find it when hoods start robbing fancy stores but only steal cufflinks! The turtles decide to investigate this and the only way to do so is to go as undercover crooks. After putting a competing gang "on ice", the turtles get the scoop on the cufflinks and learn which cufflink they really want which is a high explosive and so the turtles must keep the hoods, and Shredder, Rocksteady, and Bebop away from it.

A family secret is revealed when Lieutenant Kazou Saki arrives from Japan to arrest his brother Oroku Saki, who turns out to be the Turtles' greatest enemy. Shredder and Krang send the Technodrome from Dimension X to Earth, but Donatello re-programs it to crash in the Arctic.

A delivery boy accidentally falls into Krang's new unstable Mutagen and becomes able to transform into anyone he chooses. Shredder tricks him into helping him launch the Mutagen into space and mutate the world, but this "Mutagen Man" has other ideas.

An accident causes two garbagemen to mutate into Muckman and Joe Eyeball. Muckman's slime is found to weaken the Turtles, and Shredder tricks him into working with him.

When the city is hit with a sudden termite infestation, the only superhero who can help--Bugman--is too at peace with himself to aid the Turtles in defeating it

Baxter Stockman leads a swarm of flies in an attempt to conquer New York and prove his worth to Shredder and Krang so he can become human again.

Bebop and Rocksteady botch another mutagen experiment, resulting in a giant ice creature who Bebop dubs "Frosty", and Shredder uses this monster to freeze New York solid, preoccupying the Turtles long enough for him to steal thermal explosives needed to melt the Technodrome free from the ice.

Using a hypnotic microphone and speaker, Shredder takes over a radio station and broadcasts a signal that sends the population of New York City sailing into a dimensional limbo dubbed "Krang's Chasm".

Frip the Polarisoid arrives back on Earth with his family for a visit, and must ultimately ask the Turtles for help in reclaiming his camera while helping them stop Krang's latest plan to conquer the city

The turtles, Groundchuck and Dirtbag are taken to Shellri-La by an alien "Turtleoid" named Kerma. Kerma seeks help from the turtles to defend his planet from a two-headed dragon named Herman the Horrible.

The turtles unmask the dragon as they prove that the menacing creature is actually operated by two renegade Turtleoid delegates. Kerma return the turtles back to Earth, where they destroy Shredder's new Technodrome Mark II and afterwards defeat Chrome Dome.

As part of his latest plan, Krang brings General Traag to Earth from Dimension X as a distraction for the Turtles, while Krang tries to turn a laser at the ice and free the Technodrome from its prison at the North Pole. Meanwhile, Donatello learns a new fighting move, Wu Wei, where one ninja turns his opponent's attack against him without action

Krang's robot body goes out of control because Bebop & Rocksteady lose the right machine Chip. Michelangelo won't stop playing a video game, much to the other Turtles' annoyance.

Irma gets super magnetic powers and starts to fight crime. She decides to stop Krang's plan. When her powers wear off, the Turtles foil Krang and rescue Irma.

Michelangelo accidentally turns his brothers into five-year-olds with Donatello's "Food Rebibifier"(a machine that turns old and rotten food fresh again), while Shredder, Rocksteady, and Bebop steal weather balloons and helium tanks.

A mystery ninja steals a powerful sword that belonged to his old ninja master in order to test the Turtles' ninja spirits.�

A vain, galactic outlaw named Shreeka is after her power ring that Krang took from her. The problem is that April now has the ring.

A machine is causing the Earth to move closer to the sun. Vernon's incredibly smart nephew, Foster, helps the Turtles on their adventure.

Leonardo gets lost following a distress signal while Krang invents a "Hyper-Thruster". Krang tries to blow the Earth off its axis and melt the ice. The Technodrome is not at the bottom of the sea, but is at the North Pole

After a fight with Shredder causes Donatello to be struck by a laser beam, his personality changes to become a costumed superhero known as the Dark Turtle. His mission: Seek out & destroy Shredder. Meanwhile, a dinosaur-like alien race called Triceratons, invades Earth.

Shredder uses a time machine to travel back to Ancient Japan in the year 1583. He plans to defeat Hamato Koji, the man who founded the Foot Clan, and Splinter's great ancestor, for if Hamato Koji is defeated, then Master Splinter would never have been born and the Turtles would forever remain ordinary turtles.

While Splinter's sensei, Mogo-san, is visiting New York, a criminal gang of ninja, known as the Black Heart Gang, are terrorising the city with a crime spree, and Mogo-san's grandson, Yoku, is their leader.

A delivery boy accidentally falls into Krang's new unstable Mutagen and becomes able to transform into anyone he chooses. Shredder tricks him into helping him launch the Mutagen into space and mutate the world, but this "Mutagen Man" has other ideas.

Shredder has an accident and ends up acting like Michelangelo. The episode has the Turtles dealing with him switching between his evil personality and Michelangelo, to hilarious consequences.

An accident causes two garbagemen to mutate into Muckman and Joe Eyeball. Muckman's slime is found to weaken the Turtles, and Shredder tricks him into working with him.

After several failed attempts to get the Technodrome re-energized, Shredder and Krang run one last-ditch distraction for the Turtles at Fort Charles while Bebop and Rocksteady steal energy fuel cells from the neighboring space research center.

White-collar criminals give new meaning to the term 'hostile take-over.' Casey Jones helps the Turtles uncover who's behind a new wave of corporate crime.

A vain, galactic outlaw named Shreeka is after her power ring that Krang took from her. The problem is that April now has the ring.

In the Austrian Alps, Krang plans to use his new invention to melt the Alpine glaciers, flooding the low-lying villages

Zach's big brother, Walt, steals a rare pouch containing the only map to the Turtles' lair.

Shredder tricks Usagi Yojimbo into battling the Turtles.

An alien called a "Zipp" is sent to Earth, but this little alien soon becomes a big problem.