Ichigo vs Aizen (Final) [Bleach]

In what episode does Ichigo fight Aizen (Final Time)?

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Episode Summary:

After punching a whole in Aizen’s chest and taking the Hōgyoku, Gin concludes that Aizen was taken down.  His hopes were dashed though when Azien suddenly revived, and explained that the Hōgyoku is still connect to him even when taken away. In an instant after getting slashed by Aizen’s Sword, Gin started to have flashbacks of him, Rangiku and Aizen. In tears, Rangiku jumps on to the seemingly now dying Gin. Ichigo makes his entrance just in time to stop a possible attack by Aizien on Rangiku. Ichigo by this time however had undergone a transformation which at first perplexed everyone.

His appearance was different from his former Tensa Zangetsu form. Ichigo tells his friends not to move, with his new found strength he launches Aizen up through the air and lands him in a secluded area away for Karakura Town. The fight between Aizen and Ichigo commences with both seeming evenly matched. At first Aizen thought the swing of his sword was causing immense damage and so boasted. But Ichigo later explained that it was from his own sword, Giving a demonstration of his superior power shortly after.