1. The Mutation Situation
Aired: Oct 12, 2013 When Shredder teams with the Kraang to receive a batch of mutagen, the Turtle...
2. Invasion of the Squirrelanoids
Aired: Oct 19, 2013 While tracking mutagen, the Turtles bring a mutated squirrel back to the lair...
3. Follow the Leader
Aired: Nov 2, 2013 When the Turtles face Shredder's newest threat, an army of Robot Foot Soldier...
4. Mutagen Man Unleashed
Aired: Nov 8, 2013 Donatello obsessively experiments with mutagen in a bid to find a cure for Ap...
5. Mikey Gets Shellacne
Aired: Nov 15, 2013 Michelangelo is tired of being the "runt of the litter." But when he fools ar...
6. Target: April O'Neil
Aired: Nov 22, 2013 April tries to resume a normal teenage life, but when Karai starts hunting he...
7. Slash and Destroy
Aired: Nov 29, 2013 The Turtles find themselves being hunted by a new threat--another mutant turt...
8. The Good, the Bad and Casey Jones
Aired: Feb 1, 2014 After encountering mutants and ninjas, Casey Jones decides to take on "pure e...
9. The Kraang Conspiracy
Aired: Feb 8, 2014 Feeling left out of the action, April insists on joining the Turtles on a mis...
10. Fungus Humungous
Aired: Feb 15, 2014 A fungus mutant spreading through the sewers causes the Turtles and April to ...
11. Metalhead Rewired
Aired: Feb 22, 2014 When Donnie upgrades Metalhead's artificial intelligence, he must decide if h...
12. Of Rats and Men
Aired: Mar 1, 2014 The Rat King returns and tries to take control of Splinter again. Meanwhile, ...
13. The Manhattan Project
Aired: Mar 14, 2014 Leonardo considers asking Splinter for help while facing Shredder's new assas...
14. Wormquake!
Aired: Mar 14, 2014 Facing Shredder's deadly new assassin, Leo must decide whether to risk his br...
15. Mazes & Mutants
Aired: Apr 27, 2014 When the Turtles play a fantasy LARP game to get their mind off of things, th...
16. The Lonely Mutation of Baxter Stockman
Aired: May 4, 2014 The Turtles create a retro-mutagen to help April's father;Stockman-Fly kidnap...
17. Newtralized!
Aired: May 11, 2014 Raphael is worried about Casey's ability to handle big mutant threats; Raphae...
18. Pizza Face
Aired: May 18, 2014 Michaelangelo must battle Pizza Face, a mutant pizza that eats humans, in ord...
19. The Wrath of Tiger Claw
Aired: Jun 8, 2014 When Tiger Claw returns, he vows to hunt and destroy the turtles. Meanwhile, ...
20. The Legend of the Kuro Kabuto
Aired: Jun 15, 2014 As Leo tries to convince the team to attempt to rescue Karai, Anton Zeck stea...
21. Plan 10
Aired: Jun 22, 2014 When Raph accidentally damages a Kraang machine, it allows him to switch brai...
22. Vengeance is Mine
Aired: Jun 29, 2014 Leo stages a rescue for Karai against Splinter's wishes.
23. A Chinatown Ghost Story
Aired: Sep 12, 2014 Donnie becomes increasingly jealous of April and Casey's relationship; April ...
24. Into Dimension X!
Aired: Sep 19, 2014 After Mikey gets trapped in Dimension X to try and save Leatherhead, his brot...
25. The Invasion (1)
Aired: Sep 26, 2014 Leo and Donnie disagree about their plan to stop the Kraang invasion; Donnie ...
26. The Invasion (2)
Aired: Sep 26, 2014 Leo and Donnie disagree about their plan to stop the Kraang invasion; Donnie ...