"Roar, Chidori! Brother vs. Brother!" (唸れ千鳥 吠えろサスケ!, Unare Chidori, Hoero Sasuke!) is episode 84 of the original Naruto anime.
As Kisame and Itachi contemplate how best to carry Naruto, Sasuke arrives and attacks Itachi with his Chidori. Uninterested in their quarrel, Itachi easily stops the attack. To try and help Sasuke, Naruto attempts to summon a toad, though Kisame absorbs his chakra before he can even do so. As Kisame prepares to attack Naruto, Jiraiya arrives and summons a toad to block the would-be attack.