Masashi Kishimoto’s Naruto Shippuden picks up two and a half years after the events of the original series. While the narrative drives toward the Fourth Great Ninja War, the anime adaptation frequently interrupts the flow with extensive filler arcs and stand-alone "expanded universe" episodes. To experience the story as intended by the original author, viewers should adhere strictly to the episodes listed below.
Sasuke vs. Itachi.
Danzo, the Kage Summit, and the emergence of "Tobi." naruto shippuden canon episodes list
The invasion of the Hidden Leaf by Pain. Masashi Kishimoto’s Naruto Shippuden picks up two and