L’ennemi de mon ennemi

Things are getting complicated for the Turtles, who have to face enemies on all sides! On the one hand, the ninjas have every interest in avoiding the Kraang's flying saucer, which came straight from dimension X to eliminate them. But on the other hand, it is impossible to turn their backs on Shredder, who is always on their heels. And if Karai could help them?