Teenage Mutant Ninja Turtles (2003) - Season 5 Episode 11 -

The demonic Shredder has transformed New York City into a nightmare version of Feudal Japan and the rest of the world is next! But the Turtles have a plan, and if it takes allying themselves with some of their former enemies to bring the fight to the Shredder, so be it… because if they fail, there is no tomorrow!