List of Teenage Mutant Ninja Turtles (2012 TV series) episodes

Teenage Mutant Ninja Turtles is an American animated television series based on the eponymous characters. It aired on Nickelodeon in the United States from September 28, 2012, to November 12, 2017.

Season 1 (2012–2013)
The episodes aired with their working titles outside North America.

The turtles emerge from the sewers for the first time and have adventures where they fight against new enemies: The Kraang and the Foot Clan.

Season 2 (2013–2014)
A conflict arises in New York when the turtles accidentally drop mutagen from a Kraang ship and not only mutate April's father into a bat, but they also mutate the common citizens of New York, creating new mutants in the process. Because of this conflict, April leaves the team but ends up meeting the one and only Casey Jones.

Season 3 (2014–2015)
Now relocated to April's family farmhouse in the woods after the Kraang invasion of New York, the turtles, now with April and Casey, fight against newer, stranger mutants, as well as train in the woods on their quest to become true ninjas, all while Leo tries to overcome his leg injury.

Season 4 (2015–2017)
Space is endless but earth has only end-ness as the turtles, April and Casey must find parts of the "Heart of Darkness" in order to restore Earth after the Triceratons decimated it. The second half of this season finds the turtles facing off against an old yet completely new enemy: the Super Shredder.