Bleach Episode 91
Translated Episode Name: Shinigami and Quincy, the Reviving Power
Romanji Episode Name: Shinigami to kuinshii, yomigaeru chikara
Kanji Episode Name: 死神とクインシー、よみがえる力
As Kariya is about to stab Ichigo with his own zanpakutō, Ichigo grabs Zangetsu and stabs himself with it, forcing himself into Zangetsu’s world to ask him to use his final form. In an instant, Kariya is no longer holding the sword, and Ichigo has used his bankai. Now able to fight evenly with Kariya, Ichigo even marks Kariya on his cheek, but the attack was meant to decapitate him.
Their fight is then broken up by Ishida who has regained his Quincy powers. Ishida then fires an arrow into the gateway created by the bount. However, the arrow is not meant to destroy the gate, but complete it so that the bount can travel to Soul Society. Ishida didn’t do this to help the bount though, he did it so that he could also go to Soul Society and defeat Kariya there.