Episode Title:Good Genes, Part 2.Episode Description:The Turtles agree to Bishop's offer in exchange for the cure to Donatello's secondary mutation. They are charged with infiltrating the Foot's headquarters and retrieving the Heart of Tengu. However, Bishop does not have a cure for Donnie and the retrieval of the Heart of Tengu turns out to be the groundwork for a plan that even Bishop doesn't understand.