Ep 52: Sasuke's Anticipated Appearance!
The Emotional Naruto Shippuuden Special! Part 2

Sasuke says "Other bonds merely confuse you and distract you from your greatest desires, and the emotions that matter." Flashback to the fight at the the Valley of the End. Sasuke says he let Naruto live that day on a whim. He suddenly drops down in front of Naruto before anyone can move. Sasuke says he should have been training for Hokage instead of running after him and now he'll kill him on a whim. Naruto says someone who can't save a friend isn't fit to be Hokage. Naruto does notthing as Sasuke's sword comes down. Sai grabs Sasuke by the wrist. Sasuke says that was the right way to block and then grabs them both and releases Chidori Nagashi: Thousand Birds Current. Electric current runs all around them. Before Yamato can interfere, Naruto and Sai fall to the ground. Sakura flashback to her promise not to get the the way next time then channels chakra to her fist and attacks.

Break: Sai watches Asuma and Kurenai sitting by the riverbank together and then presents third keyword "ka."

Yamato cuts in front of Sakura with hs kunai and slices into Sasuke's sword. The sword splits and Sasuke pierces Yamato near the heart. Sasuke says that's the wrong way to block his attack. He runs a chidori down the length of the blade.

The Yamato clone dissipates and Kabuto frees himself.

Naruto tries to get up. His eyes turns foxlike. Kyuubi tries to get Naruto to release him. Sasuke suddenly appears before the Kyuubi. Sasuke observes this is the source of Naruto's hidden powers. Kyuubi is able to see Sasuke inside Naruto because of his "accursed lineage and that loathsome sharingan." Sasuke notes this is not the first time Kyuubi has encountered the sharingan. Kyuubi comments on the "power of those eyes and a chakra that is even more sinister than my own, just like Uchiha Madara."

Sasuke blows away the image of the fox, saying he doesn't know who it's talking about. Kyuubi tells him not to kill Naruto. "You'll live to regret it."

Back in the real world, Naruto gets up. While Sasuke is distracted, Yamato performs seals and then a wood block pushes the sword away from his body. Then he summons Mokuton, Mokujou Heki and pillars come from ground to encase Sasuke, but he breaks out, escaping from the top.

Break: Yamato presents last keyword "I"

End: Konoha celebrity report on Itachi's nd Sasuke's relationship.

Review: New revelations!

Notes:
Sword of Kusanagi has a unique blade. If you run a chidori down the length of the blade, not only does that increase its sharpness, but also numbs the area it cuts.

Chidori Nagashi: Thousand Birds Current is like a full body chidori.

Thoughts:
The Kyuubi calls the Uchiha a cursed clan with evil chakra. Maybe the Uchiha were genetically engineered to fight in wars.