The Eight-Tails vs. Sasuke

is episode 143 of the Naruto: Shippuden anime.

Synopsis
Sasuke fights Killer Bee and is injured by his swords. Karin heals him and Sasuke, Suigetsu, and Jugo then begin a combined assault on Bee until he decides to use the Eight-Tails' power. After having his neck blown off, Sasuke is revived again by Jugo, who regresses in age. All healed, Sasuke unleashes Amaterasu on Bee, finally able to subdue him. Meanwhile, two Cloud ninja watch the fight from a cliff and they notice the Uchiha crest on Sasuke, deciding to rush the news to Bee's big brother, the Fourth Raikage.