Leo's leadership is tested by the Kraang, challenging his calm demeanor. Nickelodeon ... Four turtles, four brothers, trained in martial arts by their rodent sensei, the Teenage Mutant Ninja ...

If you're a TMNT fan who still holds a burning nostalgia for the original '80s animated series, then Teenage Mutant Ninja ... Leonardo, Raphael, and Donatello in an upcoming issue. These Dark ...