Like its predecessor, the series is set in a fictional universe in which certain people can telekinetically manipulate, or 'bend', one of the four elements: water, earth, fire, or air. It has been continued as a comic book series. A sequel to their previous series Avatar: The Last Airbender, which aired from 2005 to 2008, the series ran for 52 episodes ('chapters'), separated into four seasons ('books'), from April 14, 2012, to December 19, 2014. The Legend of Korra (abbreviated as TLOK), also known as Avatar: The Legend of Korra, or more rarely simply as Korra, is an American animated fantasy action television series created by Michael Dante DiMartino and Bryan Konietzko for Nickelodeon.