Shredder and gang off to Dimension X. Turtles with Mary Bones, who is now in her true form and reveals her true name to be Cherubae. Shredder and crew show up searching for the Turnstone. Krang seeks help from Maligna; he wishes for ten of her children to help find the Turnstone. She relents, but at a price to be collected later.
Cudley returns, drops off Leatherhead, Wingnut, and Screwloose to help out the turtles. But then Maligna's children show up. Cue the big showdown for the Turnstone.