The Tailed Beast vs. The Tailless Tailed Beast

is episode 207 of the Naruto: Shippūden anime.

Summary
As, the battle between Kisame and Killer Bee wages on, Danzō and his men continue to make an escape with Ao in pursuit. Fū is assigned to retrieve the Byakugan at all costs but ultimately fails due to the Mizukage's interference. Kisame's attempt to capture Bee also fails as Samehada turns on him and A, Darui and C arrive in time to save him.