Episode Title:Panic in the Sewers.Episode Description:Following a nightmare involving Shredder defeating the Turtles, Splinter ends up putting the Ninja Turtles in training 24/7. The Ninja Turtles soon defend their home in the sewers when Shredder orders Dogpound and the Purple Dragons to destroy it with chlorosulfonic acid (an extremely dangerous chemical that reacts violently to water).