Teenage Mutant Ninja Turtles - Episode Guide

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. Michelangelo, Raphael, and Donatello 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.

Michelangelo is depressed because he has no money to buy a "Belly Board" when he sees a TV advertisement of a new pizza parlor called: WEIRD PIZZA TO GO. He figures that he can get a job there and, after a few nights delivering pizzas, he will have enough money to buy his board. What he doesn't realize is that Shredder owns the WEIRD PIZZA parlor and his scheme is to capture the Turtles when they order a really weird pizza. Michelangelo, disguised as an ugly human, is hired for the delivery boy position when he tells Shredder that he has a car. What he has, is the Nutrinos' Star Cruiser, which he "borrows" while Donatello is working on it. What Mikey doesn't know is that there are no air brakes. Unfortunately, for him, he discovers this during his deliveries.

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.

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.

An eccentric billionaire, Monroe Q. Flem, who is also a collector, wishes to collect every piece of TMNT memorabilia that he can get his evil hands on, including April and the Turtles themselves.

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.

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.

Raphael must contend with a mobster named Pinky McFingers when he is kidnapped from a local comedy club.

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

Raphael wins a place at the owner of a fast food chain's party. When the yacht is taken hostage by Hi-Tech pirates he and the mysterious lizard-woman Mona Lisa work together to stop them.

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.

A ray-gun makes Leonardo carefree and ignore his responsibilities. This leaves the Turtles defenseless and the city at the mercy of Maestro G Clef, a villain who destroys the city with music.

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.

When Michelangelo decides to put one of Donatello's inventions on max power for his own entertainment, he ends in a--quite literally--little problem. April and Vernon get caught in the shrinking ray while getting footage of a military ship and join Michelangelo on his wild adventure.

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

Donatello invents a machine that can freeze time, which a deranged professor steals as part of a plan to conquer the world.

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.

Dr. Polidorius, a mad scientist plotting to mutate all humanity into aquatic-beings, creates Ray (not the similarly-named Mighty Mutanimals character), who possesses several abilities of different marine species. Ray kidnaps April O'Neil, and Polidorius mutates her into a fish-woman to be Ray's mate.

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 meets his favourite comic book hero after he saves a weakened Brick Bradley in the sewers, and then he and Bugman take on the evil Electrozapper together.

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.

Michelangelo must rescue the other Turtles when they are captured by an evil scientist.

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.

Donatello earns his degree from Sopho University, but discovers that he has been mistaken for a girl, so he asks Irma to masquerade as him. Meanwhile, the real Donatello discovers a plot by Professor Philo Sopho to destroy the Earth.

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.

One night the turtles crash the video arcade to play video games all night. Leonardo's eye is caught by a video game called Tempestra's revenge. No matter how good of player, Leonardo is, he always loses to Tempestra. But things get much worse after the video game comes to life and Tempestra breaks free. She needs an awful lot of energy source in order to continue to exist.

Splinter has suddenly disappeared, and a note left behind from him forces the Turtles to go their separate ways, but one by one, they are captured by Leatherhead and the Rat King.

On his way home from getting pizza, Raphael and a cab driver accidentally get exposed to rays from a Personality Transmogrifier.

While trying to contact the Turtle Nebula, Donatello meets an intelligent lizard alien named Algernon ("Algae" for short), who must help him and the other Turtles rescue April from a greedy man named Hostile Hiram Grelch.

A failed mutagen experiment results in an invasion of giant insects and arachnids in New York City.

A Foot Soldier named Alpha-1 has his intelligence increased, but it results in a Foot Soldier rebellion against Shredder and Krang and the duo's exile from the Technodrome.

While helping April investigate a report of giant monsters attacking a superstitious farming village, Leonardo is mistaken for an alien from another planet. The lone Turtle must avoid being hunted down into extinction while also trying to rescue April from a mad scientist.

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.

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.

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.

Michelangelo's strange dreams lead him to seek out Mondo Gecko, a lizard who was caught in the same ooze as the Turtles. Gecko eventually rebels against his boss, Mr. X, and his bombing campaign.

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.

Donatello has tricked out the Turtle Van, but while taking it for a test drive, it's stolen from him by a family of robbing hillbillies. Can Donatello get the Van back in time before his brothers find out?

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.

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.

While testing an experimental Muta-Shooter invented by Krang, Shredder unexpectedly turns Napoleon Bonafrog into a muscular, monstrous version of himself.

A malfunction of Donatello's latest invention ultimately results in Raphael believing he is about to die, and ultimately trying to save the world by himself.

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.

Tired of fixing everything in the lair, Donatello decides to clone himself so he can work on his other inventions. However, Donatello's clone turns against him and joins the Rat King in an attempt to conquer the city with a rat infestation.

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.

A nerd-turned-muscleman captures three of the Turtles, and a reluctant Leonardo must ask Casey Jones for help in rescuing them.

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".

Raphael's latest study of disguises leads the Turtles to attempt a rescue when he is mistaken for a mobster named "Mad Dog McMutt".

A mad professor named Mindbender creates a law-enforcement robot named "LEX" to clean up crime in New York, but LEX ultimately starts arresting numerous innocent people for the smallest infraction. With the other Turtles unreachable, Leonardo must discover his own innate skills to stop this rogue robot before he and Mindbender declare themselves dictators of the city.

Zach, the Turtles' young friend, is put into military camp by his parents after making numerous false reports of aliens, only to find two real aliens--Wingnut and Screwloose--brainwashing the cadets to be their army and must call in the Turtles to defeat them.

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.

While on a visit to an Egyptian Exhibit, Michelangelo is mistaken for a Pharaoh named "Amun Turt-El", also known as "The Sacred Turtle".

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 friend of the Turtles, Kerma, is hunted down by a destroyer because of a glitch in its sensors. The destroyer was supposed to hunt down a space pirate named Nerma, but the glitch made it come out "Kerma".

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.

Donatello's newest invention, the "Dream-o-Vision" helmet, causes Michelangelo and Leonardo to be stuck in a nightmare world & the lair is being terrorized by a Freddy Krueger-like person.

The Turtles help a man with a disfigured face (that was actually dried paint) stop a bank robbery.

Slash, the evil mutant turtle, returns to Earth from outer space with a greatly increased IQ and a raygun that turns humans into turtles. He plans to reign as Turtle Supreme, but he will have to get past the Teenage Mutant Ninja Turtles to do it.

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.

The Turtles try to solve a missing snake mystery, but Leonardo is afraid of snakes. A scientist who had a snake venom lab accident and turned into a snake tries to turn the city into a swamp.

Michelangelo buys a parrot and names him Ditto, although the bird really belongs to a criminal who is after a rare key around Dido's neck because the Gulubi Ruby, the gem the thief stole, is in a vault that only the key can open.

Donatello's "Personality Alterator" turns Raphael too nice to fight. A mad scientist uses it to turn every policeman to nice so his robots can steal money and jewels.

April's aunt helps the Turtles stop a mad scientist from building a doomsday device.

The Turtles and Splinter win a trip to Europe... but wind up riding in a crate with the Turtle Van. Once ashore they head for Paris. Meanwhile, Krang devises a giant electromagnet to pull the Technodrome free of its dinky Dimension X asteroid, using the Eiffel Tower in Paris as a giant antenna.

In the Technodrome, Krang works on an oxidizer rocket with enough power to blast the Technodrome to Earth. But something goes wrong, and instead of thrust, the device grows rust!

The Turtles are vacationing in the Alps, as Splinter goes off to a nearby mountain to meditate. April is in an Alpine village with Irma when she notices the ice and snow melting, unusual for this time of year.

Krang decides to use a Hydrofluxer device to threaten to flood Venice, holding it for ransom. The Turtles, in Venice, run into Shredder as he's portaled into a Venetian sewer.

Two snobbish art-collecting aliens arrive in Florence and begin stealing great works of art, while the Turtles and April are there. The citizens blame the Turtles for the theft, and after being defeated in their efforts to stop the aliens, the TMNT must escape an angry mob.

The Turtles are in Lisbon, Portugal, enjoying the sights. Krang sends Shredder and the mutants there to set up a special lens that will focus the sun's rays to create a devastating heat ray. The Turtles rescue April and Irma from Shredder, Vernon gets mixed up in a bull fight, and finally destroy the lens just as it's about to wreck the city.

Krang and Shredder decide to use Ireland as their base for the Technodrome. With a device called the Rainbow Trans-Charmer, the villains intend to turn harmless little creatures like sheep and rabbits into slavering beasts. The Turtles and Splinter, vacationing in Ireland, are attacked by the monster-sheep and track Shredder, Bebop and Rocksteady to the Dublin Zoo, where they are transforming the animals.

The Turtles and Splinter are visiting London's British Museum, and study a portrait of King Arthur, Queen Guinevere and the Knights of the Round Table. In Dimension X, Krang is using a long-range scanner and discovers a rare metal buried in a ruined castle in England.

As April, Irma and Vernon visit Athens, April receives a present of a strange necklace. She begins to go into trances, during which she acts like an imperious queen! Just then, Shredder along with Rocksteady and Bebop, who have been persuaded by Krang to search for a valuable energy source, arrive and find that the necklace is the power source that they need!

April is covering the revival of the luxury train the Orient Express. Shredder is on the train with Rocksteady and Bebop carrying the Supercharger, a device to accelerate the train to superspeed, sending it out over the Bosphorus and crashing into the Middle East oil fields, destroying them. The Turtles board the train and send the Supercharger flying with Shredder aboard.

The Turtles and April are in Amsterdam. April is covering the showing of the world-famed Duchess Diamond. Krang wants the diamond, a flawless stone, to focus the rays on his Laser Dimension Blade, which will cut through the dimensions and bring the Technodrome to Earth.

A descendant of the Viking raiders, Eric Red, seizes both April and Professor Swenson's map to the underground volcanos in Scandinavia. He plans to tap into the molten energy, melt the polar ice cap and flood the world's coastal cities, making them easy prey for his wanna-be Vikings.

The Turtles and Splinter win a trip to Europe... but wind up riding in a crate with the Turtle Van. Once ashore they head for Paris. Meanwhile, Krang devises a giant electromagnet to pull the Technodrome free of its dinky Dimension X asteroid, using the Eiffel Tower in Paris as a giant antenna.

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.

A small alien being, named Quirx, crash-lands on Earth, with intergalactic stormtroopers in hot pursuit. The Turtles must figure out how to get Quirx back to his home planet, before Earth is destroyed.

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.

Two convicts from Dimension X are brought to Earth when Donatello's Portable Portal Generator malfunctions.

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.

In an attempt to finally defeat the Turtles once and for all, Shredder assembles Leatherhead, Tempestra, Scumbug, Chrome Dome, Antrax, The Rat King and Slash to form a team that proves too much for the TMNT.

The Neutrinos return and assist the TMNT in keeping a new invention out of Krang's clutches.

Kerma the space turtle returns once again for the Turtles help in programming his city's new defence robots but Groundchuck and Dirtbag have also returned to the city to cause trouble.

Baxter Stockman & his alien computer return to Earth from the Dimensional Limbo & take possession of Shredder's Retro-Mutagen Ray Gun.

The Turtles discover an Atlantean city, not in ancient Greece, but in modern times. After meeting a merman who, in reality is the true King of Atlantis, the Turtles must defeat Shredder & dethrone Bebop, who been set up as a puppet king.

Professional mutant hunter Dirk Savage is conned into to rounding up New York's mutants, Tokka, Rahzer, Two of the Punk Frogs, Leonardo, Michelangelo and Mondo Gecko all fall prey and become part of a mutant slug's army.

In order to defeat the Turtles, Krang creates 6 clones of himself to deal with them. But, when the clones start to think for themselves & Krang loses control, the Turtles must save the city.

A new amusement theme park has opened with Shogun, Medieval & Future themed attractions. The Turtles are invited to try out the attractions, but when the robots in the park start to play too rough, the Turtles are in big trouble.

After bringing the Technodrome back to the surface, Shredder and Krang trap the Turtles and send them to Dimension X where they become slaves. In the meantime, Shredder and Krang back on Earth once again try to take over the world.

Shredder & Krang are still loose on Earth, but without the resources of the Technodrome, they plan to steal equipment from the abandoned Hall of Science at the World Fair. Krang's former weapons engineer, Drakus, using the guise of Beserko, also shows up to cause trouble.

While Krang tries to re-acquire the Technodrome from Dimension X, Shredder tracks down the Rat King & makes an alliance with him in order to destroy the Turtles.

A band of ninja, led by a mysterious villain named Megavolt, are stealing electronic equipment from power plants all over the city, and the Turtles are being blamed for the crimes. The Turtles must find a way to defeat Megavolt & clear their names before it is too late.

A mysterious organization of mutants calling itself Highly Advanced Variety Of Creatures has surfaced in the city. Although their pro-mutant intentions seem good on the outside, what are their true motives? The Turtles must find out.

Titanus & his H.A.V.O.C. organization are back, and this time they are planning to build a Sky Platform so that they can retrieve a lost Flux Transformer from a military base. The Turtles rescue a resident of Dimension X, named Gargon, held captive by Krang on Earth, who agrees to help track down Shredder & Krang.

Still after the Flux Transformer, Titanus & his mutants track its unique electronic signals, in order to locate it & get it back. Meanwhile, the Turtles have their hands full, when an enforcer named Krakus shows up. The Turtles must find out who Krakus is & whether he is friend or foe.

Krang & Shredder steal the Astro-Viewer, a powerful telescope, before disabling a starfighter passing over Earth. Once aboard the starfighter, Shredder steals the Fire Star, a crystalline fragment with the power of 1000 suns which renders its possessor invincible.

Krang & Shredder are using the city's power to operate Krang's new Transdimensional Portal to Dimension X, so that they finally has access to their Rock Soldier armies & resources.

A mysterious young man, who has been tracking the Turtles' movements, wishes to train under Master Splinter's guidance. Meanwhile, the Turtles race to stop Lord Dregg's plans for global domination.

The Turtles try to stop Dregg's Techno Gang from stealing a Proton Accelerator, but due to Carter's interference, the aliens get away. Dregg needs the device to repair his Molecular Converter, but the Turtles need to expose Dregg's true intentions.

Dregg hires an alien bounty hunter named Medusa to help capture the Turtles. The Turtles must fight off this new threat. Meanwhile, Carter realises that he is more of a hindrance than a help. Meanwhile, an alien slug, called a Slorr, hatches & begins terrorising the city.

The Turtles set out to prove Dregg's true motives, after nearly getting arrested by military police at Hyper Dyne Labs. The Techno Gang steal a substance called X-Fire, a highly explosive fuel. The Turtles are also still coming to grips with their unstable mutations.

Using a Hypno Transmitter, Dregg is disrupting all the TV stations in the city with a hypnotic signal, which becomes permanent after 20 minutes. After the Turtles destroy his transmitter, Dregg decides to replicate the Turtles' mutagen in order to make his Techno Gang invincible.

A new foe appears in the form of the time-obsessed Chronos, who has thrown the city into chaos, due to all clocks malfunctioning. Can the Turtles, April & Carter stop him before it is too late?

Dregg plans to build a Star Shield, a device that Dregg claims will protect Earth from hostile alien invaders. Meanwhile, the Turtles, with the help of April & her mini-cam, hope to expose Dregg for the fraud that he is. The Turtles also find out that Dregg has built an android replica of Cater.

An interdimensional being called Doomquest comes to Earth to try to get a powerful crystal from Lord Dregg. The turtles find that their unstable mutations are now starting to cause them to lose their intelligence whenever they mutate into their new forms. In the end, April is able to successfully expose Lord Dregg's true intentions to the world.

While the Turtles work on using fragments of the Vortex Crystal to stabilize their mutations, Lord Dregg plans to use the fragments to create another Vortex Crystal to power his Vortex Transporter. Meanwhile, Dregg's second-in-command, HiTech, is blasted into space, to be replaced by Dregg's top scientist, Mung, as his new second-in-command.

While Raphael, Michelangelo, Donatello and Carter work on restoring Leonardo to his regular self, Mung steals all the plutonium from a power plant in order for Dregg to build a Plutonium Ray to turn Leonardo into a radioactive killer.

Lord Dregg teleports Shredder and Krang from Dimension X to the Dreadnaught in order to learn more about the Turtles and Earth's weapons. Meanwhile, after permanently stabilizing his mutation, Carter finally leaves the Turtles and returns to college.

After draining the Turtles' life energy and Krang's intelligence, Dregg plans to fire the Vortex Transporter at the Sun, bringing a piece of the Sun down to Earth. If the people of Earth refuse to surrender, Dregg will cause the Earth to become a second Sun.

After re-energizing the present-day Turtles, the Turtles of the past have only 3 hours to get back to their time, or they will all cease to exist. Meanwhile, during the 15 hours it took to re-energize the Turtles, the remainder of Dregg's invasion fleet has been completed and has been unleashed on the city and now the Turtles and Carter have to stop Dregg, Krang, and Shredder.

A slimy amoeba-like mobster from Dimension X, known as the GlobFather, steals the Protein Computer. The GlobFather is working for Dregg and Dregg plans to use the Protein Computer to hack into all of Earth's telecommunications systems and military computers, to control them via his own brain.

Lord Dregg has managed to open a gigantic portal that is large enough to pull the entire Earth into Dimension X. While trying to figure out how to stop it, Leonardo, Donatello and Master Splinter are pulled through the portal, after Dregg turns the portal on them.

Lord Dregg launches a final attack on the Ninja Turtles. The Turtles must travel back to the Technodrome to retrieve Krang's old android body to defeat him.