Teenage Mutant Ninja Turtles (2003): Season 1, Episode 8

1 - 8: Fallen Angel

On a nightly training run, the Turtles and Casey Jones break up a Purple Dragon robbery. One of the perps is Angel, a girl Casey knows from the neighborhood who's going through her initiation rites to become a Purple Dragon. Casey tries to stop Angel from going down the wrong path, but ends up getting captured by the Purple Dragons and offered up as the "prize" in the gang's fight club competitions. It's up to Angel to bring the Turtles in to help rescue Casey. The Turtles must battle it out against the biggest, meanest Dragons, including Hun, their man-mountain of a leader.