Feigned smile
The new team Kakashi heads out for the Heaven and Earth bridge. Sai, Sakura, and Naruto come to blows after just 5 minutes on the same team due to Sai making fun of Sasuke. Therefore, Yamato decides they need to improve on teamwork and uses Mokuton to create a wooden cage threatening to lock the team up unless they behave. Given an ultimatum between being locked up or spending the night at a hot springs, the team chooses to visit the springs to improve team cohesion. Naruto still despises Sai despite this effort, and several insulting remarks from Sai worsen team relations.
Aired 29/11/2007EP 36 - Feigned smile

Naruto: Shippuden
Naruto: Shippuuden is the continuation of the original animated TV series Naruto. The story revolves around an older and slightly more matured Uzumaki Naruto and his quest to save his friend Uchiha Sasuke from the grips of the snake-like Shinobi, Orochimaru. After 2 and a half years Naruto finally returns to his village of Konoha, and sets about putting his ambitions to work, though it will not be easy, as he has amassed a few (more dangerous) enemies, in the likes of the shinobi organization; Akatsuki.
(Source: Anime News Network)