Episode Title:
The Nine-Tails Unleashed / The Top-Secret Mission Begins.
Episode Description:
Episode 40 The Nine-Tails Unleashed: Yamato signals Naruto, Sakura and Sai to appear on the bridge. On seeing Naruto, Orochimaru begins mocking him and compares him to Sasuke, which causes the Nine-Tails's chakra to leak from an enraged Naruto's body and ascends him to a Three-Tailed form. Meanwhile, Yamato remembers Jiraiya speaking of the appearance of number of tails on Naruto during their training, and had specifically warned of Naruto's Four-Tailed transformation.
Episode 41 The Top-Secret Mission Begins: Naruto gets more enraged in his three-tailed state, and throws Kabuto away, who inadvertedly knocks Sakura out too. Naruto's anger eventually escalates to him destroying the Tenchi Bridge and he takes to a forest to battle Orochimaru. Sai creates an ink bird and flies beneath the collapsing bridge to the site of Naruto and Orochimaru's battle, instead of catching a falling Sakura. Yamato saves her using his Wood Style Jutsu, and creates a wood clone to follow Sai. In the forest, Naruto's ever-increasing aggression causes his blood to mix with the Nine-Tails's chakra as his chakra cloak envelops him in the form of a four-tailed miniature fox.
