Village in Distress: A New A-Ranked Mission!

is episode 69 of the original Naruto anime.

Synopsis
After Sakura awakened Naruto and Shikamaru, Kakashi instructs them to track down Sasuke and stop him. Then after they have done that, they should wait and hide in a safe place and wait for further orders. Meanwhile, Orochimaru begins his battle with his former sensei, The Third Hokage. Both display powerful techniques in what the observing ANBU describe as a Kage-level battle. Early in the battle, Orochimaru summons the First Hokage and Second Hokage from the dead to fight the Third. The risen Hokage apologize to their former student as Orochimaru prepares them for combat. The Second Hokage says that it is the forbidden technique Summoning: Impure World Resurrection.