Naruto Shippūden - Season 6 - Eps 136: The Light & Dark of the Mangekyo Sharingan
Itachi reveals to Sasuke that Madara is the second culprit behind the Uchiha massacre, as well as the history of the Mangekyo Sharingan and the first two Uchiha to obtain it: Madara and his brother. One question still remains: Why did Itachi really spare Sasuke's life?
About Naruto Shippūden

Title: Naruto Shippūden
First Air Date: 2007-02-15
Last Air Date: 2017-03-23
Status: Ended
Rating: 8.536/10 (from 8306 votes)
Language: JA
Seasons: 21
Total Episodes: 500
Network: TV Tokyo
Genres: Animation, Action & Adventure, Sci-Fi & Fantasy
Production Companies: TV Tokyo, Pierrot, Sound Box, Rakuonsha, Aniplex
Synopsis
After 2 and a half years Naruto finally returns to his village of Konoha, and sets about putting his ambitions to work. It will not be easy though as he has amassed a few more dangerous enemies, in the likes of the shinobi organization; Akatsuki.
Cast

Junko Takeuchi
Naruto Uzumaki (voice)

Noriaki Sugiyama
Sasuke Uchiha (voice)

Chie Nakamura
Sakura Haruno (voice)

Kazuhiko Inoue
Kakashi Hatake (voice)

Showtaro Morikubo
Shikamaru Nara (voice)

Satoshi Hino
Sai (voice)

Akira Ishida
Gaara (voice)

Hideo Ishikawa
Itachi Uchiha (voice)

Koichi Tochika
Neji Hyuga (voice)

Keiko Nemoto
Shizune (voice)