Fire Lord Ozai, the current Fire Lord of the Fire Nation, is waging a seemingly endless war against the Earth Kingdom, the Water Tribes, and the already destroyed Air Nomads. The season goes around the protagonist, Aang, and his friends Katara and Sokka and their journey to the North Pole (to North Water Tribe) to find a Waterbending master to teach Aang and Katara how to control water. The series was created by Michael Dante DiMartino and Bryan Konietzko, and starred Zach Tyler Eisen, Mae Whitman, Jack DeSena, Mako, Dante Basco, and Jason Isaacs as the main character voices. Season One ( Book 1: Water) of Avatar: The Last Airbender had 20 episodes and they were shown from 21 February 2005 until 2 December 2005. List of Avatar: The Last Airbender episodes