Story by Kevin Eastman, Tom Waltz. Art by Mateus Santolouco, Dave Wachter. Cover by Mateus Santolouco.
As the Turtles continue to get used to a world leading the Foot Clan post-Shredder, they return to the Technodrome to monitor the revival of the Utroms on Burnow Island. They are surprised to meet a new mutant-Leatherhead. Will the mysterious mutant be friend or foe? Collects issues #56-60.