Fate

is episode 140 of the Naruto: Shippuden anime.

Synopsis
Madara Uchiha tells Sasuke about the fate of the Uchiha clan and about Itachi's life. He tells that in reality, the Uchiha clan were not trusted and thus spied on by Konoha. Madara tells him that the three highest council members from Konoha knew the truth, after Hiruzen Sarutobi's death. Sasuke hears that Itachi was a spy from Konoha, planted into the Uchiha clan, who were under supervision by the ANBU. Sasuke realizes that Itachi wasn't a bad person.