HBO has unveiled a new, extended trailer for Game of Thrones, which returns with the Season 3 Premeire Sunday, March 31 at 9 PM ET. Among the brief teases we see in this video is another look at the fully grown dragon of Daenerys Targaryen (Emilia Clarke), the petulant King Joffrey (Jack Gleeson), and everybody's favorite "imp" Tyrion Lannister (Peter Dinklage). Take a look at how Westeros is preparing for the long winter ahead in Season 3.