Naruto Shippūden: Season 4, Episode 73

4 - 73: Akatsuki's Invasion

Naruto proceeds to the next step of his training, the cutting of a waterfall. Hidan and Kakuzu reach the Fire Temple and fight Chiriku, so as to obtain the bounty on his head. After defeating him, they move out to claim the bounty and thereafter target the Nine Tails Jinchūriki Naruto.