When two chefs known for their tempers face off, it is bound to get hot in the kitchen. First, Dale challenges Tiffani to relive a past failure of hers in preparing dim sum. Then Tiffani counters with a contest based on an American canapé and classic cocktail. For the Duel, featuring guest judges Rob Zombie, Scott Ian, and Gary Holt, the chefs must prepare a vegan meal and service will get hard core as one Chef will be rocked. These Top Chef All-Stars are out to prove that the third time's the charm.