Teenage Mutant Ninja Turtles (2003) (2003)

S2E17 Junklantis

During a trial run of their latest invention, the Shell Sub, the Turtles find themselves in a tight spot when they stumble upon their nemesis, Garbageman, who is busy constructing an underwater metropolis. With the stakes raised, the Turtles must quickly decide whether to dive in and confront this familiar foe or find a way to escape the impending threat of his aquatic plans.