Naruto Episode 8: The Oath of Pain
Episode 8 of 220 of Naruto, aired November 21, 2002, 25 minutes. Available with English subtitles and dub where released.
Episode summary
With Kakashi captured, Naruto, Sasuke and Sakura must defend against Zabuza's attacks. Naruto realizes that working together with Sasuke may be the only way to save Kakashi. Will the combined effort of the two be enough to free Kakashi and defeat Zabuza?