Netflix's live-action 'Avatar: The Last Airbender' series is changing showrunners once again. Showrunner Albert Kim is exiting the show. This news comes after he previously replaced franchise creators Michael Dante DiMartino and Bryan Konietzko. Co-executive producer Christine Boylan and executive producer Jabbar Raisani — both of whom were hired by Kim — will take over as the drama's third showrunners for the previously announced second and third seasons.