Fate

is episode 140 of the Naruto: Shippuden anime.

Synopsis
Madara Uchiha, known as Tobi, tells Sasuke about the fate of the Uchiha clan and his life. He tells that in reality, the Uchiha clan were undertaken and spied on by Konoha, Sasuke is in rage and disbelieve about this. Madara tells that the three highest council members from Konoha knew the truth, but didn't want to tell. 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.