Naruto: Shippūden S21E05 - Moonlit Night

Itachi joins the ANBU and is quickly promoted to captain. But he must report directly to Danzo, and is placed as a double agent to observe the Uchiha clan, who are in the midst of planning a coup d'état. With dissatisfaction rising within the clan, the Uchiha ultimately decide to carry out their revolt, and the fateful night approaches.