17 fresh chefs infiltrate sin city to take on culinary challenges in the season six premier.

The male chefs and the female chefs compete in a battle of the sexes in catering a poolside bachelor and bachelorette party.

The chefs will be creating meals for the US Air Force Thunderbirds, the most renowned aircraft demonstration squadron.

The contestants pair up to create the perfect French dish for acclaimed chefs Joël Robuchon, Daniel Boulud, Hubert Keller, Laurent Tourondel and Jean Joho.

The contestants cook with cactus, sleep under the stars, and prepare a menu for Las Vegas cowboys; chef Tim Love serves as a guest judge.

The contestants deconstruct a classic dish for magicians Penn & Teller. Chef Michelle Bernstein serves as a guest judge.

A slot machine determines the guidelines for the quick-fire challenge; the contestants prepare a special dinner for members of the Macy's Culinary Council.

The chefs head to guest judge Charlie Palmer's Aureole restaurant to host a ``Pig and Pinot'' event.

Chef Rick Moonen's restaurant is taken over by the contestants and then he serves as their guest judge.

The chefs head to Las Vegas to visit "Craft Steak" and cook for actress Natalie Portman and friends.

Past chefs recount their favorite moments from the series.

The chefs must make the perfect breakfast in bed dish. Nigella Lawson serves as guest judge.

A challenge based on the Bocuse d'Or. Guest judges include Jerome Bocuse and Thomas Keller.

The final four chefs compete in Napa Valley to determine who will be the final three.

Chefs and judges reminisce about the season and answer viewer questions.