Teenage Mutant Ninja Turtles

When Shredder teams with the Kraang to receive a batch of mutagen, the Turtles' problems only get worse-even putting their friendship with April at stake.

When the Turtles face Shredder's newest threat, an army of Robot Foot Soldiers, Karai captures Leonardo and forces him to do battle with these new and improved ninjas that can adapt to his every move.

While tracking mutagen, the Turtles bring a mutated squirrel back to the lair. When it starts multiplying, the Turtles must hunt the squirrel mutants and prevent them escaping into the city.

Donatello obsessively experiments with mutagen in a bid to find a cure for April's mutated father. Unfortunately this puts April in danger from a new threat-Mutagen Man!

Michelangelo is tired of being the "runt of the litter." But when he fools around with some mutagen, he gets a dangerous infection that is mutating out of control.

April tries to resume a normal teenage life, but when Karai starts hunting her again, April realizes she may have put her new friend Casey Jones in danger as well.

The Turtles find themselves being hunted by a new threat-another mutant turtle called Slash, who has a personal vendetta against the brothers.

Feeling left out of the action, April insists on joining the Turtles on a mission to TCRI, where they learn a shocking secret about April's past.

After encountering mutants and ninjas, Casey Jones decides to take on "pure evil" alone. When he meets Raphael, the two hot-headed fighters must put their dislike for each other aside and work together against a common foe.

A fungus mutant spreading through the sewers causes the Turtles and April to experience their worst fears as Leonardo must face his greatest fear- losing his team.

When Donnie upgrades Metalhead's artificial intelligence, he must decide if he can trust a sentient Metalhead or if he has created a new foe.

When the Rat King returns, Splinter must overcome his guilt and fear of the Rat King controlling his mind in order to defeat his foe once and for all.

Facing Shredder's deadly new assassin, Leo must decide whether to risk his brother's lives or ask for Splinter's help. Donnie must put aside his rivalry with Casey in order to uncover a new Kraang plot.

Facing Shredder's deadly new assassin, Leo must decide whether to risk his brother's lives or ask for Splinter's help. Donnie must put aside his rivalry with Casey in order to uncover a new Kraang plot.

The Turtles try to relax by playing a fantasy role-playing game, but when the game becomes real, they must learn the difference between fantasy and reality.

Feeling guilty for turning April's father into a mutant bat, the Turtles perfect a retro-mutagen to help him. Unfortunately, things get worse when Baxter Stockman threatens to mutate April.

Raph is worried about Casey's ability to handle big mutant threats...when they meet Slash again and discover he has a partner of his own: THE NEWTRALIZER!

Tiger Claw returns and intends to destroy the Turtles at any cost.

Mikey discovers that a new mutant is trying to attack and capture people using living pizzas, but he struggles to convince the others who don't believe him.

Leo, worried about Karai, tries to convince the others to rescue her, while a master thief steals Shredder's helmet, and it falls into the Turtles' unsuspecting hands.

Raph's hot-headed impulsiveness lands him in deep trouble when he accidentally damages a machine that forces him to switch minds with a Kraang.

Leo goes behind Splinter's back when he stages a rescue for Karai, whose desire for revenge against Shredder brings about grave consequences for them all.

As Donnie becomes increasingly jealous of April and Casey's relationship, April is kidnapped by an evil spirit who intends to drain April's powers.

At home, Mikey always messes things up, but when the Turtles go to the bizarre realm of Dimension X, he's the only one who can figure the place out.

Leo and Donnie disagree about their plan to stop the Kraang invasion. When Leo makes a critical mistake, he is separated from the team and Donnie must step up as a leader.