Naruto Episode 18
In the village, Inari attempts to rally support amongst the villagers against Gato. Elsewhere, Naruto agrees to kill Haku, who instead stops Naruto, and moves in the way of Kakashi’s attack, saving Zabuza at the cost of his own life. Zabuza attempts to cut through Haku to reach Kakashi, but is soon overpowered by Kakashi. Before the battle can end, Gato arrives with his men, and reveals he will kill everyone present.
Source: Wikipedia
Naruto Episode 18 – The Weapons Known as Shinobi
