Naruto (2002)

S1E8 The Oath of Pain

Title: The Vow of Suffering Plot: With Kakashi in captivity, Naruto, Sasuke, and Sakura find themselves fending off Zabuza's relentless assaults. Naruto comes to the realization that collaborating with Sasuke could be their best chance to rescue Kakashi. Can their teamwork prove strong enough to liberate Kakashi and overcome Zabuza's formidable threat?