1. Within the Woods Episode 1 Within the Woods October 3, 2014, 22 min The team tries to deal with the possibility that Leo will not get better; a new mutant captures Raphael.
  2. A Foot Too Big Episode 2 A Foot Too Big October 10, 2014, 22 min When the Turtles discover Bigfoot in the woods, Donnie befriends it and insists they protect it from a hunter.
  3. Buried Secrets Episode 3 Buried Secrets October 17, 2014, 22 min When the guys discover a Kraang ship buried under April's house, they also uncover April's lost mother.
  4. The Croaking Episode 4 The Croaking November 7, 2014, 22 min When he gets upset, Mikey flees and befriends a mutant frog in the woods, only to learn the frog and his family have nefarious plans.
  5. In Dreams Episode 5 In Dreams November 14, 2014, 22 min When the Turtles are trapped in their dreams by creatures, April and Casey must figure out how to wake them up.
  6. Race with the Demon! Episode 6 Race with the Demon! November 21, 2014, 22 min When Casey and Donatello bond while building Casey's new hot rod, the bond is challenged by a hot-rodding mutant.
  7. Eyes of the Chimera Episode 7 Eyes of the Chimera January 11, 2015, 22 min When Casey, Raph, Mikey and Donnie are captured by a new mutant, April and Leo must overcome disabilities in order to save them.
  8. Vision Quest Episode 8 Vision Quest January 18, 2015, 22 min Leo takes the Turtles to train in the woods in an advanced ninja ritual; the Turtles must overcome their weaknesses and face their enemies to become a true ninja.
  9. Return to New York Episode 9 Return to New York January 25, 2015, 22 min When the Turtles return to the city to search for Splinter, they discover that the city has been overrun with Kraang.
  10. Serpent Hunt Episode 10 Serpent Hunt February 1, 2015, 22 min As the Turtles search for Karai, they are forced to deal with a city filled with Kraangdroids as well as Zeck and Steranko.
  11. The Pig and the Rhino Episode 11 The Pig and the Rhino March 8, 2015, 22 min Donnie finishes a new batch of retro-mutagen in hopes of saving Karai; the Turtles are hunted by Shredder's new henchmen, Bebop and Rocksteady.
  12. Battle for New York (1) Episode 12 Battle for New York (1) March 15, 2015, 22 min The Turtles must brave the bizarre world of Dimension X to save the enslaved people of New York. Part 1
  13. Battle for New York (2) Episode 13 Battle for New York (2) March 15, 2015, 23 min Part 2
  14. Casey Jones vs the Underworld Episode 14 Casey Jones vs the Underworld March 22, 2015, 22 min Casey Jones thinks he can take on the criminal underworld on his own, but soon discovers that he is in over his head.
  15. The Noxious Avenger Episode 15 The Noxious Avenger April 26, 2015, 22 min A new and unfamiliar mutant known as Muckman begins to gain notoriety as New York City's "Monster Hero."
  16. Clash of the Mutanimals Episode 16 Clash of the Mutanimals May 3, 2015, 22 min The Shredder kidnaps and experiments on the Mighty Mutanimals.
  17. Meet Mondo Gecko Episode 17 Meet Mondo Gecko May 10, 2015, 22 min Michelangelo and Casey become friends with Mondo Gecko, a radical, skateboarding, reptilian teenager.
  18. The Deadly Venom Episode 18 The Deadly Venom May 17, 2015, 22 min When Karai is brainwashed, she begins hunting the Turtles.
  19. Turtles in Time Episode 19 Turtles in Time August 2, 2015, 22 min When the Turtles are whisked through time by apprentice Time Master Renet, they all must work together to defeat the evil Time Master Savanti Romero.
  20. Tale of the Yokai Episode 20 Tale of the Yokai August 9, 2015, 22 min When the Turtles are accidentally transported to the past, they happen to cross paths with a familiar ninja clan.
  21. Attack of the Mega Shredder! Episode 21 Attack of the Mega Shredder! August 16, 2015, 22 min Leonardo decides to sneak into Shredder's lair alone, and winds up facing the biggest mutant threat yet.
  22. The Creeping Doom Episode 22 The Creeping Doom August 23, 2015, 22 min After an accident, Donnie finds himself slowly losing his intelligence.
  23. The Fourfold Trap Episode 23 The Fourfold Trap September 13, 2015, 22 min After being kidnapped by the hypnotized Karai, the Turtles are placed in deadly traps that they must work together in in order to escape. Splinter, in his efforts to save…
  24. Dinosaur Seen in Sewers! Episode 24 Dinosaur Seen in Sewers! September 20, 2015, 22 min Raphael meets a confused alien dinosaur named Zog, the Triceraton.
  25. Annihilation: Earth! (1) Episode 25 Annihilation: Earth! (1) September 27, 2015, 22 min When the turtles get word of the Kraang's return, they realize there is an even bigger threat coming to Earth.
  26. Annihilation: Earth! (2) Episode 26 Annihilation: Earth! (2) September 27, 2015, 22 min When the turtles get word of the Kraang's return, they realize there is an even bigger threat coming to Earth.