Teenage Mutant Ninja Turtles (2003)

Mayhem from Mutant Island (7x14)

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During a night of showing off their extreme sports gear, the Turtles are attacked by a monster from beneath the Earth. They trace it to a remote island where they uncover their old foe, Baxter Stockman, who has created vicious monstrosities to unleash on the unsuspecting public.