They reappear at the end of "City at War", where taking refuge in a condominium deep in the woods, the duo act as bodyguards for Shredder as he is cared for by Stockman-Fly due to the injuries he sustained leaving him hooked up to medical equipment to keep him alive before Stockman-Fly injects him with mutagen. They soon are teamed up with Tiger Claw in "Broken Foot" to defend the Auman Chemicals factory from Karai as she begins to systematically take down Shredder's criminal empire one piece at a time. After Karai, Shinigami, and Leo are able to damage the factory, but are forced to flee due to being outnumbered by Foot-bots, the duo pursue the Party Wagon, and manage to crash it by removing one of its back tires with their own van's weapons, but the Turtles escape. They regroup with Tiger Claw to defend the factory producing the Foot-bots, but though they manage to capture Karai, Shinigami, and the Foot Ninja with them, the Turtles, minus Donatello, who was injured by the earlier attack's explosives, are able to rescue them and destroy the factory, forcing the duo and Tiger Claw to escape before the NYPD arrived to investigate the destruction.