Twelve renowned chefs battle in culinary challenges in Las Vegas in the Season 4 opener. Here, the masters play a card game to score ingredients, then they create an extravagant buffet for some of Sin City's hottest performers.

The meal mavens prepare cuisine for a wedding.

This week, the Chefs are tasked with taking ordinary salad bar ingredients and making them “pop” for music legends, the B-52’s. Then the Chefs will take a trip to the Grand Canyon for a cookout like never before. The Chefs will be paired up to cook for the Hualapai tribe, using ingredients from the tribe’s sacred land.

In this week’s Quickfire challenge the Chefs must make a dynamic duo dish for a couple of dynamic musicians – The Indigo Girls. For the elimination challenge, the Chefs are tasked with making a whimsical all-you-can-eat - bottomless bloodys & mimosas brunch at an upscale sexy pool party, hosted by Ms. Vegas, Holly Madison. Bikini-clad servers will serve the chefs’ creations to Holly’s friends lounging poolside. Special guest judges include The Indigo Girls and Holly Madison.

On this week’s episode, the chefs will be creating an aphrodisiac dish using known aphrodisiac ingredients. The chef whose dish really turns them on will be the winner for this challenge. Lotus of Siam is a legendary Nevada Culinary landmark that has amassed award after award. For this Elimination Challenge, our chefs will be faced with the task of creating their own Thai restaurant in the Top Chef Masters kitchen and attempting to create their own versions of classic Thai dishes. Special guest judge is Dita Von Teese.

This week the chefs will battle it out -- facing off in a boxing ring to serve our critics and boxing champ, Sugar Ray Leonard. The winner of the first match will compete against the winner from the second match in a third match for the win and $10,000. The losers from the first and second match will face off one last time to determine who will be sent packing. Special guest judge is Sugar Ray Leonard.

It's getting down to the wire -- this week, the chefs will participate in one of the world's greatest underground dining events: a Diner en Blanc. For our Masters to take on this Diner en Blanc, each chef will create a picnic style meal with abundant ingredients to create an epic feast and pack it up for the first ever Diner en Blanc picnic in Vegas.

The ace chefs instruct a mystery guest to make a dish in the penultimate Season 4 episode. Later, they mentor culinary students.

The winning chef is named in the Season 4 finale. Before that, the final two culinarians battle it out by creating a dish with the help of staffers from their own restaurants back home.