The Fourth Hokage's Death Match

is episode 248 of the Naruto: Shippūden anime.

Summary
Kushina successfully delivers Naruto but their celebration comes short when Tobi suddenly appears and kills Taji and Biwako. Tobi attempts to kill Naruto but Minato quickly saves Naruto from explosion, and as Minato fled and put Naruto to safety Tobi manages to release the Nine-Tails from Kushina. Tobi takes control of the Nine Tails by using his Sharingan and tries to eliminate Kushina, but quickly saved by Minato and being brought back to Naruto. Tobi summons the Nine-Tails to start the carnage over Konoha and Minato prepares himself to face Tobi. As Minato arrives in Konoha and Nine-Tails' Tailed Beast Ball was being absorbed, Tobi appears on Minato and tries to grab him however Minato teleports and been easily followed by Tobi. Minato and Tobi start their clash, and Minato cleverly defeats Tobi using his Rasengan and applying the contract seal to remove control on the Nine-Tails.