The Turtles discover for the first time that they are not the weirdest things in New York when they encounter two villains from the Hidden City pursuing a cat-like agent. They have their first encounter with Baron Draxum who is making mutants with the help of his Oozesquitos.
Our wannabe heroes try to solve the biggest little problem in the city; the Turtles have to fight their bad habits and a mutant chef.
The Turtles help April throw a not-so-happy birthday party; this just in: anchor man turned mutant-worm used to report the news, now he's making headlines.
After learning that the Jupiter Jim moon buggy has been repossessed, the TMNT need to do a job to get it back; the Turtles must endure Splinter's Rat Flu and the terrible seven stages that come with it.
Donnie's newly built Turtle Tank goes missing; in order to get a birthday gift for Splinter, the Turtles have to take on thuggish Times Square Mascots.
Leo unseats Raph's idol as pro wrestling champion of the world; if people are able to beat the mutant maze in 30 minutes or less, they win free pizza.
The Turtles look for a way to eliminate New York City's Oozesquito problem before more mutants are made. This plot brings them into conflict with Big Mama in her plot to make mutants to fight for her entertainment in the Battle Nexus, which is soon joined by Baron Draxum.
The Turtles have a hard time watching their idol skateboard while stopping a burglary. Hypno-Potamus returns and causes havoc at April's homecoming dance.
Leo, Mikey and April investigate a mysterious spectre haunting a themed supermarket; April and the brothers make Raph face his greatest fear: an adorable kids' TV show bunny.
After an unfortunate "glue" accident, the Turtles have to fight a whole host of villains; the Turtles' first public musical gig is interrupted by Albearto and his animatronic army.
An evil tech club lures Donnie with the promise of a gorgeous purple jacket; it's Pizza Week, the greatest week of the year, but the Turtles' favorite pizza joints keep getting taken out.
Donnie's new artificial intelligence invention takes over the lair; Mikey goes on a solo mission to retrieve a classic "Lou Jitsu" video game.
The Turtles end up facing a new and dangerous threat in their beloved city as Baron Draxum, Huginn, and Muninn gather some of their toughest mutant enemies like Meat Sweats, Hypno-Potamus, Warren Stone, Repo Mantis, and the Sando Brothers in a plot to destroy them.
The simple task of returning a single DVD is complicated by endless craziness in New York; things go sour when the Turtles try to help a down-and-out mutant.
Donnie gets more than he bargained for after he "enhances" his brothers' intelligence; after a bizarre transformation, Mikey and Meat Sweats become BFFs.
As the Turtles try to find pieces of a strange metal Baron Draxum is looking for, Splinter intents to get to the bottom of these odd activities at April's new job at the Foot Shack. He soon learns that the Foot plan to resurrect their ancient master the Shredder by reassembling the Kuroi Yoroi armor. As the parties clash, the secrets of Splinter's past finally come to light.
Leo loses his brothers in a portal and must venture to the mystic Hidden City to save them; everyone wants something that Warren Stone has, but he's not giving it up without a fight, and a side of betrayal.
Leo and Donnie try desperately to help April enjoy a quiet day with a new friend; Raph becomes friends with a new sparring partner and must keep it secret from his brothers who don't like the guy.
While helping Señor Hueso at Run of the Mill Pizza, Leo and Mikey get sidetracked by brotherly competition; Baron Draxum struggles to move up the ladder in the Foot Clan.
The Turtles plumb the depths of a mysterious hidden library in search of away to rescue Mayhem; a competitive new video game has swept New York and Donnie will do anything to reach rank number one.
The TMNT's lazy river ride through the sewers turns savage when Raph's accidentally separated and left alone; the Turtles' failed attempts to do good deeds turn all of New York against them.
A day with Dad leads to Splinter entering the Turtle Tank in a demolition derby; Splinter struggles as both a parent and a sensei when he teaches his sons the Art of Ninja Concealment.
The Turtles try to recover a piece of the Dark Armor from Repo Mantis's scrapyard; a ferocious mutant tries to ruin April and the TMNT's fun day in the snow.
April and Sunita search New York for Sunita's stolen cloaking brooch; the Turtles meet their favorite sci-fi movie star, Jupiter Jim!
With the help of Baron Draxum and the Guardsmen, the Foot Clan begin to move the nearly-completed Kuroi Yoroi armor to a ritual site. To transport it, Baron Draxum persuades Big Mama to lend the Foot Clan her train. After training the Turtles following the advice of his ancestors, Splinter trains the Turtles for this fight.
The Turtles have been captured, and Baron Draxum sends April back to have Splinter bring the final piece of the Kuroi Yoroi armor to him or else. As the faceplate is on his teapot, Splinter comes up with a plan to rescue his sons with the help of April, Bullhop, Frankenfoot, S.H.E.L.L.D.O.N, and Todd Capybara. When Baron Draxum reassembles the Kuroi Yoroi armor and dons it, the Turtles must find a way to get the Kuroi Yoroi armor off of him.
The TMNT must stop a persistent foe from shredding NYC, but problems arise when they split up to handle things.
The TMNT need to learn how to listen and get in touch with nature in order to save Todd after he's captured by a group of hunters; Huginn and Muninn recall their first day working for Baron Draxum.
The Turtles have a secret that comes back to haunt them; April presents her award winning documentary about the Turtles' annual event: The Lair Olympics.
Donnie's "parenting style" causes S.H.E.L.L.D.O.N. to run away from home; Mikey embarks on his craziest mission: trying to get Draxum to tolerate humans.
Leo lands his dream job as mascot of the local professional basketball team; Raph teaches his brothers a lesson in responsibility after they eat pizza puffs laced with a mystic toxin.
Their favorite space hero movie star in need of a sidekick, the TMNT do all they can to win their dream job; Leo and Señor Hueso help the reformed Capitán Piel on one last dangerous mission.
April and Splinter accidentally step to a gang of dangerous middle school brownie sellers; Baron Draxum's lunchroom concoction comes to life and terrorizes April's school.
Raph is mistaken for a heinous criminal in the Hidden City; always a man of science, Donnie can't accept April going to witches for mystic help on a science project.
Splinter's magical day with Mikey is interrupted by a mysterious and tiny guest; Leo's efforts to get into an exclusive Hidden City spa threaten to unweave his day of relaxation.
April and the Turtles must help Splinter save his chain of dojos from being taken over by an evil rival; Hypno-Potamus traps the Turtles in a magical 80s movie montage.
Big Mama turns New York City into her new Battle Nexus arena and the TMNT have to fight to save everyone they love.
When a powerful foe returns, the Turtles' only hope lies within the most dangerous place they've ever been: Splinter's mind; the Turtles meet Splinter's distant relative and discover a powerful new ally.
In a bid to save New York and the Hidden City, the Turtles prepare for their greatest battle yet.
