In this episode, the remaining 7 chefs undertake the Chairman's charge of TRANSFORMATION.  In the Secret Ingredient challenge, the secret ingredients are American condiments and sauces like ketchup, ranch dressing and mayonnaise.  The chefs have 30 minutes to transform these condiments into a dish of their choosing. The Chairman ups the ante by sending the chefs to the San Diego County Fair where they must gather ingredients from the concession stands in a mad dash and transform fair food (1 fried item, 1 grilled item, 1 item on a stick) into Iron Chef level dishes in 60 minutes.  Their cook station: the world's largest grill "The Outlaw Grill" weighing 27 tons and covering nearly 100 feet of turf this massive piece of equipment can cook 1,000 sausages at once.  At one point during this difficult battle, the grill becomes a FIERY INFERNO that torches all the food on it. 

Host Alton Brown and the Chairman welcome the remaining five chefs to Las Vegas on the CityCenter promenade and present them with a test of inspiration. World-champion pastry chef Jean-Phlippe Maury meets the contestants in a pastry kitchen with his dessert showpiece collection and reveals chocolate as their secret ingredient. The contenders must then create a wedding-worthy chocolate dessert. For the Chairman's Challenge, the chefs prepare a buffet inspired by the modern Las Vegas surroundings in just three hours, with the threat of a double elimination adding to the pressure.