Japanese title: Gokuhi ninmu sutāto (極秘任務スタート)
When his third tail appears, all that Naruto can see is Orochimaru. He is blind even to his teammates. As the fighting accelerates, Sakura is knocked unconscious. While Yamato is distracted saving Sakura, Sai finally sets his top-secret mission, entrusted to him by Danzo, into motion. Meanwhile, taunted by Orochimaru and impatient to rescue Sasuke, Naruto finally releases his forbidden fourth tail.