The Turtles must save April and stop The Kraang from destroying Earth with their new destructive weapon, The Technodrome.
Donatello tries to break Kirby O'Neil out of a secret Kraang prison. That's easier said than done, however, when Donnie realizes that there's a dangerous mutant inside the prison as well.
Michelangelo has no choice but to fight his own brothers when they all fall under the control of a parasitic wasp.
The Turtles must team up with the Pulverizer after the Shredder threatens to create a team of mutants to take on the Turtles.
Baxter Stockman traps the Turtles in a maze with Fishface and Dogpound.
The Turtles go all out to stop the Kraang invasion for a final time.
The Turtles come face to face with a wannabe hero known as The Pulverizer.
When April's science project attracts the Kraang's attention, the turtles must step in to save the day.
While Raphael takes a turn leading the group, Leonardo ventures elsewhere and meets Karai, a female ninja with dark secrets.
The Turtles have their hands full when a new foe named The Rat King plans on taking over New York City. Unfortunately, The Rat King is also planning on controlling Splinter's mind.
Michelangelo befriends an unstable mutant alligator who possesses a strange piece of Kraang technology, but the other Turtles aren't sure whether "Leatherhead" is a friend or a foe.
The Turtles must divide and conquer when the Purple Dragons and Baxter Stockman team up to introduce a new threat, the mechanical Mousers.
When their home is attacked by Bradford, the Turtles must step up and defend the only home they've ever known.
The Turtles spring into action when April receives a distressing phone call from her father. Now it's up to the team to stop the Kraang from detonating a bomb in the city.
Leonardo struggles with his past when an old enemy, Xever, comes back to attack a noodle shop.
While searching for a missing scientist, Donnie and April find a psychic monkey instead.
Chaos ensues when Donatello creates Metalhead, a robotic turtle to fight alongside the rest of the group.
The Turtles meet a devious inventor named Baxter Stockman. But is this man all that he appears to be?
Michelangelo accidentally befriends Chris Bradford, a henchmen who's secretly working for Shredder!
When a video surfaces showing the Turtles topside, Master Splinter worries that their secrecy will be compromised. Meanwhile, Raphael struggles to keep his anger problems in check.