"A Shadow in Darkness: Danger Approaches Sasuke" (闇にうごめく影 サスケに迫る危機!, Yami ni Ugomeku Kage Sasuke ni Semaru Kiki!) is episode 51 of the original Naruto anime.
Despite having formulated a strategy beforehand, Chōji quickly loses to Dosu, concluding the preliminaries. The nine qualifying genin are assigned opponents, and they are all allowed to leave for a month of training before the finals. Elsewhere, Kabuto prepares to kidnap Sasuke under Orochimaru's orders, but he is stopped by Kakashi and is forced to retreat. Naruto later meets with Kakashi in hopes of training with him for the finals. Kakashi, planning on training Sasuke instead, offers Ebisu as a trainer for Naruto.