Naruto Shippuden Episode 209 - Danzo's Right Arm
Kakashi decides to stop Sakura from fighting Sasuke himself, telling Yamato and Naruto to go home. But Naruto has a panic attack from the prospect of his friends murdering Sasuke and passes out. Meanwhile, Sasuke confronts Danzo, becoming angered by the Sharingan he's implanted into his arm. Sasuke attacks, and seemingly kills Danzo many times, but he keeps reviving himself. Whenever he does this, though, Karin notices one of his Sharingan begin to close.