"Heir to Darkness" is episode 148 of the Naruto: Shippūden anime.
Synopsis
After returning to Mount Katsurugi, Tonbee Hotaru and Team 7 planed their next move. Tonbee explained the clan's history and En no Gyoja's dream. Tonbee also said that if Shiranami comes back that the clan will be restored. Naruto Uzumaki went to search for him. Meanwhile others are preparing to remove the kinjutsu.