Orochimaru's Test Subject
While pursuing Orochimaru, Kakashi wanders into a village inhabited by the Iburi Clan, a group of people with the unique ability to turn into smoke. Kakashi is soon captured and learns that the villagers all serve under Orochimaru.
Aired 06/03/2014EP 353 - Orochimaru's Test Subject
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)