Episode Title:Casey Jones VS. the Underworld.Episode Description:Livid for being left behind by the Turtles to save New York with the Mighty Mutanimals (from the previous episode), Casey tries to prove that he can take on the criminal underworld on his own. However, he discovers that he is in way over his head, when the Shredder gets Manhattan's criminal underworld on the Foot Clan's side. Casey also goes head to head with the Purple Dragon's new and official leader Hun, as the Foot Clan plans to use a factory in the Purple Dragon's territory to further the Foot Clan's latest plot.