Dinner: Impossible

Robert Irvine has to make a four-course meal for 300 spellers and 800 adults for the Victory Dinner for the Scripps National Spelling Bee. He also has to use ingredients that represent all 26 letters of the alphabet.

Robert Irvine helps Episcopal Academy's class of 2007 celebrate their graduation with a meal for 600 guests. He has six hours, three Philadelphia school district lunch ladies and one sous chef to help, and he has to use the food planned for the event.

Robert Irvine heads to one of the oldest bakeries in New Jersey to work through the night to make sure the store is full of pastries and ready to make morning deliveries. He has to make 2,400 pastries, but he's not a very good or experienced baker.

Robert Irvine's mission is to feed 1,000 hungry construction workers his version of an upscale brown bag lunch. The catch: He's cooking in two Salvation Army canteen trucks normally used for disaster relief.

Robert Irvine competes against special guest chef Guy Fieri in Camp Chen-a-Wanda's first Camp Cook-off. Fighting rain, heat and each other, Robert and Guy compete like rabid teenagers for the title of Champion!

Robert Irvine is sent on a wild shopping spree to cook for the Mall of America's 15th anniversary.

Robert Irvine must create upscale hors d'oeuvres for a fashion show on a New York City garden rooftop. He has eight hours to design a menu, shop and prepare food for 200, but getting through city traffic will eat up half of his time!

Robert Irvine heads to the Magic Live! Convention in Las Vegas to feed 32 magicians and guests. He has to work with dangerous chemicals and unusual powders as well as contend with a disappearing sous chef named Neil Patrick Harris.

Robert Irvine heads to Lake Tahoe to the American Century Championship Celebrity Golf Tournament. He has just six hours to feed a tent full of 250 celebrity players and tournament sponsors at the Edgewood Tahoe Golf Course.

Robert Irvine arrives at Graceland to receive his challenge from Priscilla Presley. She asks him to dispel the myth that Elvis only ate junk food and make a down-home, family-style country dinner for 100 fans who have come to Memphis to celebrate Elvis.

Robert Irvine cooks dinner for 1,000 residents and volunteers of Biloxi, MS, who have been rebuilding the city after Hurricane Katrina. He also escorts one resident, Ms. Brenda, to receive the keys to her brand-new furnished home.