The Closed Door

is episode 170 of the original Naruto anime.

Synopsis
Naruto awakens in the girl's hut, where she identifies herself as Isaribi. Upon thanking her, Naruto realises that she is being ostracised by the local residents, and he angrily chases away the children that have arrived to torment her. Meanwhile, Orochimaru is meeting with Amachi, a scientist conducting experiments under his direction. Sasuke Uchiha is also present, and ends their conversation when it's directed towards him. The remaining members of Team Anko have arrived at the island, where they are briefed on the payment schedule that they have to defend, and they locate the Demon of the Ocean (Kaima) in the meantime. However, Naruto arrives, and identifies the Kaima as Isaribi. The arrival of Yoroi enables Isaribi to escape, and the two escape. Anko attempts to pursue but is paralysed by pain from her cursed seal. Anko falls unconscious from the pain caused by the cursed seal.