Leo goes behind Splinter's back when he stages a rescue for Karai, whose desire for revenge against Shredder brings about grave consequences for them all.
As Donnie becomes increasingly jealous of April and Casey's relationship, April is kidnapped by an evil spirit who intends to drain April's powers.
At home, Mikey always messes things up, but when the Turtles go to the bizarre realm of Dimension X, he's the only one who can figure the place out.
Leo and Donnie disagree about their plan to stop the Kraang invasion. When Leo makes a critical mistake, he is separated from the team and Donnie must step up as a leader.
Mutants, creatures, and shadow-lurkers have been spotted in New York. Channel 6 News has the exclusive footage of the evidence of this invasion, along with eyewitness testimony from terrified citizens who just want to feel safe and get their pizzas back.
The team comes to grips with the possibility that Leo won't get better, while things only get worse: a new mutant captures Raph!
The Turtles discover Bigfoot in the woods, and Donnie befriends it, insisting they protect it from a hunter that is after it.
The team discovers a Kraang ship buried under April's house where they find… April's Mom! But as April reconnects with her lost mother, is she really all that she seems?
An upset Mikey runs away from home and befriends a Mutant Frog in the woods. When he learns its Frog family plans to attack the human world, he has to figure out a way to stop them.
Creatures that feed off dreams trap the Turtles inside their own dreams as April and Casey must find a way to wake them up.
Casey and Donnie bond over building Casey's new hot rod, but their newfound friendship is challenged by Speed Demon, a hot-rodding mutant who is terrorizing the roads.
Greg Cipes
Michelangelo / "Mikey
Seth Green
Leonardo / "Leo"
Sean Astin
Raphael / "Raph"
Rob Paulsen
Donatello / "Don" or "Donnie"
Mae Whitman
April O'Neil