He doesn't. >.<
Sasuke hasn't really killed Naruto yet. But i think he will the last episode.
Sasuke apppears in the first episode
Sasuke has not died yet.
It was sealed into him in episode one. He first unleashed it in the episode where Haku nearly killed Sasuke. He first spoke to the Kyuubi during his training with Jiraiya before the chuunin finals.
Episode 109. an ep. or two later is when Sasuke retrieval arc. begins.
Sasuke joins Orochimaru in the end of episode 109 but everyone(except Sakura) finds out in episode 110
episode 1001
Episode 117
Episode 211
just watch the anime its episode 121in the manga look for book 40Sasuke killed Deidara in episode 121-125 of Naruto Shippuden.-incorrect, Deidara killed himself, I really hate it when people say Sasuke killed him.* CORRECT ANSWER *Deidara encounters Sasuke in episode 123 of Shippuden.Also, yes, Deidara kills himself, sasuke would probably never been able to kill him.Deidara is plain flat out AWESOME*Also, this battles spans from Episode 123 to 124.
He and the other sound ninja fight Sasuke in episode 109 (An Invitation from the Sound).