Naruto's Counterattack: Never Give In!

is episode 29 of the original Naruto anime.

Synopsis
Despite Naruto's timely appearance, Sasuke is decides to sacrifice their scroll to ensure the team's survival. Before he can do so, Naruto takes the scroll from him, believing that the real Sasuke would never willingly give up. Naruto begins fighting the Grass ninja and his snakes, tapping into the demon fox's chakra in the process. The ninja, recognizing Naruto as the demon fox's container, seals the demon fox's chakra, rendering him unconscious. Naruto's efforts, however, rejuvenate Sasuke with determination, and he prepares to battle the Grass ninja.