The Teenage Mutant Ninja Turtles are back in an all-new animated series on Nickelodeon! Surfacing topside for the first time on their fifteenth birthday, the titular turtles, Leonardo, Michelangelo, Raphael and Donatello, find that life out of the sewers isn't exactly what they thought it would be. Now the turtles must work together as a team to take on new enemies that arise to take over New York City.
The Turtles believe they have defeated most of their old enemies, but they soon discover that a new evil is rising from the ashes.
Karai searches for the legendary Kuro Kabuto, claiming to be the rightful heiress of the Foot Clan, when she suddenly encounters an old rival.
Donnie's grudge with Don Vizioso threatens the Turtle's newest mission.
When Mona Lisa suddenly arrives on Earth, Raphael must get her and Bishop to work together to defeat an alien threat and save the Earth
The Newtralizer returns to New York City, more powerful than ever before, and joins forces with a dangerous and unexpected ally. With the help of Raphael's Salamandrian girlfriend, Mona Lisa, the Turtles fight back to defend their city.
: The Turtles are transported to an alternate dimension, where they befriend the rabbit samurai and master swordsman: Miyamoto Usagi.
Usagi leads the Turtles through a haunted forest, where they end up encountering mischievous and highly dangerous spirits.
Usagi and the turtles must help Kintaro fulfill his destiny as they reach the end of their journey.