Bravo's hit culinary series "Top Chef" is back with 15 rising chefs, one red-hot Los Angeles kitchen and some of the restaurant industry's most renowned talent. In the premiere, the chefs dive straight into the heat with their first quickfire challenge where they have 30 minutes to shop for ingredients, flambé their dish and present it to the judges, including "Top Chef" season 1 winner Harold Dieterle. The winner of this flambé challenge will have immunity for the elimination challenge, where they will face their toughest critics. New to the judges' table this season is host, Padma Lakshmi, who joins Head Judge, Chef Tom Colicchio of New York City's Gramercy Tavern and Craft Restaurants and Gail Simmons of Food and Wine Magazine. Harold Dieterle, who plans to open his Manhattan restaurant Perilla later this year, will guest judge and help determine who stays and who must pack their knives to go home.