Synopsis:
April and Turtle bid farewell to Ray. They board a train to return to NYC. They almost make it home when they get sidetracked by music that leads them to one of Shredder's abandoned headquarters. A local metal band has set up shop there. Suddenly, old securities systems spring into place and robotic foot soldiers spring out, which the Turtles fight into submission. However, during the battle the band's leader, Mondo, is flung into some mutagen and transormed into a gecko creature. Unfortunately, Mondo's girlfriend dumps him after his transformation.
TMNT finally arrive home and tell Mondo he can stay with them. But then Donatello notices a bunch of meteors zooming around a familiar looking building...