Join the Teenage Mutant Ninja Turtles as they face off against new opponents, the evil Lord Dregg and Hi-tech, while also fighting against their own uncontrollable mutations in the mind-bending Season 9! With the help of Carter, a new ninja ally, Michelangelo, Leonardo, Raphael, and Donatello struggle to stop Lord Dregg from enslaving Earth, while overcoming Replicon, a battle droid that regenerates after each defeat.