Zero Visibility: The Sharingan Shatters

is episode 15 of the original Naruto anime.

Synopsis
The battle between Naruto and Sasuke and Haku continues!

Kakashi reveals his Sharingan to Zabuza yet again. Zabuza tries to prevent it by stabbing Kakashi's hand. Kakashi reveals his Sharingan anyway. Zabuza explains how Haku observed Kakashi's Sharingan and found a way to counter it. Zabuza then goes along explaining how Haku's jutsu even surpasses his.

In the meanwhile inside the mirrors, Naruto begins to replicate over and over again. After a couple of time Sasuke begins to be able to see Haku's movements. Sasuke kicks water into the air which he uses to detect Haku, he then begins to think perhaps something else will work also. When Haku begins attacking Naruto's clones again, Sasuke sends his Fire Release: Great Fireball Technique in Haku's back and actually manages to hit Haku slightly. Sasuke is ready to try again, but this time Haku attacks Sasuke first.

Zabuza uses his Hidden Mist Technique, but this time the mist is so thick that not even he would be able to see through it. Kakashi deflect a few shuriken, and Zabuza claims the next time Kakashi will see him, will be when Kakashi will die. Zabuza vanishes again, and Kakashi tries to think of Zabuza, tries to figure out where Zabuza will strike. Kakashi finally realizes Zabuza will attack Tazuna and Sakura. He quickly rushes to his side and takes an attack from Zabuza as Sakura screams.