Episode Title:Turtles at the Earth's Core.Episode Description:After witnessing a live dinosaur wander in the city and disappear abruptly, the turtles follow its tracks. What they find in the large hole where it entered is a shocking revelation: The era in which the dinosaurs roamed the earth. Shredder and his mutant goons, Bebop and Rocksteady are there to collect a crystal needed by Krang to recharge the power cells of the Technodrome.