S4 • Immortal Devastators: Hidan and Kakuzu
Asuma and Shikamaru have to think on their feet as they face the mind-boggling jutsu of the Akatsuki pair, Hidan and Kakuzu. At the last minute, the Akatsuki are called away, but not before dealing a fatal blow to a revered shinobi of the Leaf. The devastated ninja left behind can think only of revenge, but Tsunade is opposed to the scheme until an offer of help arrives from an unexpected source.
Episodes
72 The Quietly Approaching Threat Aug 21, 2008 
73 Akatsuki's Invasion Aug 28, 2008 
74 Under the Starry Sky Sep 4, 2008 
75 The Old Monk's Prayer Sep 11, 2008 76 The Next Step Sep 25, 2008 
77 Climbing Silver Sep 25, 2008 
78 The Judgment Oct 2, 2008 
79 Unfulfilled Scream Oct 2, 2008 
80 Last Words Oct 16, 2008 
81 The Sad News Oct 23, 2008 
82 Team Ten Oct 30, 2008 
83 Target: Locked On Nov 6, 2008 
84 Kakuzu's Abilities Nov 13, 2008 
85 The Terrifying Secret Nov 20, 2008 
86 Shikamaru's Genius Dec 4, 2008 
87 When You Curse Someone, You Dig Your Own Grave Dec 4, 2008 
88 Wind Style: Rasen Shuriken! Dec 11, 2008