 After encountering Zog, the Turtles joined in his efforts, unaware that he planned to alert the Triceraton armada of Earth's location so that they could destroy it and wipe out the Kraang.The Kraang's plans to open a portal were thwarted, and the signal reached the other Triceratons without difficulty.In "Annihilation Earth" the Turtles learn of the existence of the Utrom Tribe, a splinter group of the Kraang, from a member who goes by the name of Bishop, who is responsible for the design of the Kraangdroid bodies.