To prove that Turtles can be friends with humans, Michelangelo uses a social networking site to befriend Chris Bradford, a famous martial artist who is secretly Shredder’s top lieutenant.

When the Turtles sneak out against Splinter’s wishes, they battle Baxter Stockman, a deranged inventor in mechanical battle armor.

Weary of using his simple bo staff to fight the technologically advanced Kraang, Donatello creates Metalhead, a remote-controlled robot turtle to fight in his place.