Naruto Season 1 Episode 7

On the way to the Land of Waves, with Kakashi threatening to abandon the mission if he does not provide an adequate explanation for lying about the mission's difficulty level, Tazuna reveals desire to build a bridge to save the impoverished Land of Waves from the wealthy crime lord Gato. Hearing his story, Team 7 agree to go through with the mission regardless for humanitarian reasons. However, once on the bridge, the group is ambushed by Zabuza Momochi, a rouge ninja from the Hidden Mist Village who works for Gato. Refusing to hand Tazuna over, Kakashi is forced to reveal a strange eye. The former confused on how Kakashi gained it, Sasuke and Zabuza both recognize the strange eye as the Sharingan. While Team 7 protects Tazuna, Kakashi engages Zabuza with the two using clones to distract the other to get them from behind.