Cursed Seal Counterattack

is episode 109 of the Naruto: Shippūden anime.

Synopsis
The Sealing Team prepared to start sealing the Three-Tailed Beast and tell Sai to take Yūkimaru somewhere safe, but he gets attacked by Kabuto's men. Kabuto meanwhile prepares his plans while Lee, Tenten, and Kiba are also attacked. Rinji finds his men and converts them back to his side, ordering them to attack the Sealing Team; they're stopped by Kakashi, Yamato, and Shino. Rinji then makes Yūkimaru eat the pills to control the Three-Tails, which Naruto and Guren learn about.