1 part Ongoing On their 15th birthday, brothers Leonardo, Raphael, Donatello, and Michelangelo go up to the surface for the very first time. They witness Okumura Nari, April O'Neil, and Kirby O'Neil being kidnapped by alien robots called the Kraang. They save the girls, but now must find a way to save Mr. O'Neil. However, their presence brings the Foot Clan and their leader, the Shredder, to New York, where Nari's past comes back to haunt her.