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.

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.

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.

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

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

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.

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.

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!

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.

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.

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.

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.

Shredder tricks Usagi Yojimbo into battling the Turtles.

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.

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.

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.

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.

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

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

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

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.

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?

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.

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

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.

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.

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.

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 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.

Aliens abduct Donatello and Rocksteady.

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?

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.

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.

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.

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

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

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.

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

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.

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

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

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.

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

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.

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