Water, Earth, Fire, Air. The four nations once lived in harmony, with the Avatar, the master of the four elements, maintaining the peace between them. But everything changed when the Fire Nation attacked and wiped out the Air and Nomad tribes—the first step in the Fire Nation's conquest of the world. With the current incarnation of the Avatar yet to appear, the world had lost hope. But when young Air and Nomad tribe member Aang (Gordon Cormier) reawakened to become the next Avatar, like a light in the darkness, hope emerged. The last of his kind, Aang, along with his new friends, brother and sister Sokka (Ian Owsley) and Katara (Chiaventio), and the Southern Water Tribe, set out on a fantastical and thrilling quest to save the world and fight back against the terrible attack of the Fire Nation King Osei (Dae-Hyun Kim). But their mission is made particularly difficult by the determination of Prince Zuko (Dallas Liu) to capture them. The group will meet many allies and colorful characters along the way and need to ask for their help. Albert King (Sleepy Hollow, Nikita) serves as showrunner, executive producer and writer. Jabar Raisani (Lost in Space, Stranger Things) and Michael Goy serve as executive producers and directors, with Roseanne Liang (also co-executive producer) and Jett Wilkinson also directing. Rideback's Dan Lin (The Lego Movie, Aladdin) and Lindsay Liberatore (Texas Rangers) serve as executive producers.