Naruto Season 1 Episode 8

Kakashi is eventually caught off guard and is captured in a Water Prison Jutsu. With Kakashi deposed of, Zabuza creates a water clone to go after Team 7 and Tazuna. Though Kakashi tells his students to run, Naruto remembers the promise he made to himself of not backing down and decides to fight to save Kakashi and keep Tazuna alive. With Naruto using his transformation skills with Sasuke's expertise with a Fuma Shuriken, the two youths succeed at forcing Zabuza in a position to release Kakashi in order to dodge Naruto's kunai.