"Something Important…" (大切なモノ, Taisetsuna Mono) is episode 49 of the Naruto: Shippūden anime.
Before Yamato's team departs to find Sasuke in the hideout, Kabuto appears in front of them and attacks them, before freeing Sai. However, Sai, wanting to learn more about his own bonds with his deceased brother through Naruto's bond with Sasuke, betrays Kabuto and aids Yamato in his capture. A tied up Kabuto gives a vague description of Sasuke's location to the team, thinking that Orochimaru would just kill them either way. Leaving Yamato's wood clone to watch over Kabuto, Yamato and his team enter Orochimaru's hideout and they split up to find Sasuke, Naruto and Sai heading one way, with Sakura and Yamato to another.