Book Four: Balance is the fourth and final season of the animated television series The Legend of Korra by Michael Dante DiMartino and Bryan Konietzko. It consists of thirteen episodes ("chapters"), all animated by Studio Mir. The episodes are made available on the Nickelodeon website and other online outlets each Friday beginning on October 3, 2014.
Book Four is set three years after the previous season. It deals with Avatar Korra's journey of self-discovery following the physical and psychological injuries she incurred in the fight with Zaheer and with unrest in the Earth Kingdom where Kuvira, formerly a security officer in Suyin Beifong's service, seeks to seize power by military force.