While pizza purists in Brooklyn and Naples insist on classic ingredients, innovative chefs in Japan and beyond are redefining what makes a good pie.

Taco lovers introduce a skeptical David to an explosive array of flavors at LA food trucks, Arab-style taco joints and pop-up restaurant Noma Mexico.

Frustrated by New Orleans chefs' stubborn refusal to try new things, Dave heads to immigrant-rich Houston for a taste of spicy Viet-Cajun cuisine.

While Peter explores the many flavors and styles of U.S. barbecue, Dave samples mind-blowing Peking duck, yakitori and Korean barbecue.

Dave learns the tricks to making Nashville hot chicken, scopes out KFC's China menu and delves into the loaded history of soul food.

Forget fortune cookies and General Tso's chicken: Secret menu items, local delicacies and a lobster volcano reveal the true range of Chinese cuisine.

Time for the ultimate showdown: Italian stuffed pasta vs. Asian dumplings. Will xiaolongbao or tortellini carry the day?