Batman Teenage Mutant Ninja Turtles #3 (Of 6)

"The Batcave is overrun with turtles-and its landlord is not at all pleased about it. But Batman's going to have to put aside his animosity toward his uninvited guests because he's about to have his first run-in with their deadliest enemy, Shredder! Meanwhile, the Turtles must face up to the grim possibility that they might never get back to their world. "