In episode 81, Kisame shredded the top layer of Asuma's left arm, shedding a lot of blood. Yet, in one scene in this episode after Gai arrives, the blood is almost completely gone when they show Asuma again.
In a scene after Itachi used his Tsukuyomi on Kakashi, the scar on Kakashi's left eye was gone.
In his room, Naruto was packing his things in a blue backpack. When he was leaving Konoha, the backpack that he had was yellow.
Gai: Don't look in his eyes. That's the key to fighting an opponent who's using Sharingan. Focus on his feet. You can read what he's going to do from his feet.
Jiraiya: Sooner or later, Naruto must learn. Because of what he is, he'll have to live his life watching his back. That's the boy's destiny.
Naruto: (Singing) I'm gonna learn a new jutsu. (Stops singing) Now maybe I'll get Sakura's attention and a kiss.
Itachi: We're looking for something, and we know it's here.
Kakashi: And what would that be?
Jiraiya: What a knucklehead. Still, you can't help liking him.
Jiraiya: The woman we're looking for is really beautiful, I mean gorgeous.
Naruto: Like I care. Look, Pervy Sage, who do you think you're talking to? I'm not some dumb kid you can fool with lame excuses.
Kisame: (After Itachi destroys Kakashi's clone) A water clone? I guess the people of my village should be honored that he's copied our jutsu so well.
Itachi: You were good enough to almost anticipate my attack...almost!
Kisame: (After getting kicked by Guy) Who's this?
Guy: I'm Might Guy!
Kisame: You're Might Guy, huh? Mighty stupid-looking guy.
Kisame: Copy Ninja Kakashi? Huh, I heard that kid, Zabuza, took you on!
Itachi: Kakashi, you may have your Sharingan, but you are not Uchiha.
YTV Airdate: May 25, 2007
Kisame's sword is called Samehada, which literally translates to "Shark Skin".
The edited version of the English dub had Kakashi's body up against a solid wall instead of a Tau cross during Itachi's genjutsu.
Original Airdate: May 4, 2004
Original Episode Title: Sharingan vs. Sharingan
Romaji Episode Title: Sharingan tai Sharingan
Kanji Episode Title: 写輪眼ＶＳ写輪眼!!
This is the first time in the series that the Tsukuyomi technique is utilized.
Kisame was in a 7-man assasination group, known as the Shinobi Warlords of the Mist, with Zabuza at one time.
Itachi became an ANBU Captain at the age of 13.
Akatsuki is a group of the 9 worst S-rank criminals. Orochimaru was one of them at one point, but left because he feared Itachi.