The Quietly Approaching Threat

is episode 72 of the Naruto: Shippūden anime.

Summary
Asuma apologises at the grave of the Third Hokage for not understanding his advice concerning who the "king" of the Land of Fire is. At the hospital, Naruto and Sai recover, and Naruto resumes his training. Tsunade receives a report from Kakashi that the Akatsuki is once again on the move. Elsewhere, Yugito Nii, the Two-Tails jinchūriki, struggles against Hidan and Kakuzu, unleashing her beast form, but is defeated and captured. Hidan and Kakuzu then turn their attention to the Land of Fire for their next target.