Book Four: Balance is the fourth and final season of Michael Dante DiMartino and Bryan Konietzko's animated television series The Legend of Korra. It is divided into thirteen episodes (or "chapters"), all of which were animated by Studio Mir. Beginning on October 3, 2014, the episodes were made accessible on the Nickelodeon website and other online sites on Fridays, and the show premiered on Nicktoons on November 28, 2014. The critical response to Book Four, as well as the entire series, was overwhelmingly good. The fourth book takes place three years after the conclusion of the previous season. It follows Avatar Korra's self-discovery journey following the trauma she had in Book Three, as well as security officer Kuvira's effort to unite the Earth Kingdom under her dictatorial leadership .