Adam's in Nashville, TN, for off-menu deep-fried grilled cheese; a sweet ice cream soda science experiment that you can order only with a secret tweet; a hidden 3-cheese chili hot dog; and a sweet and spicy chicken-and-waffles creation.

Adam heads to Boston to discover the best off-menu dishes and restaurants in unlikely locations. He uncovers authentic Australian pies in an artful shipyard, an adults-only secret steakhouse and a lobster eatery in a house's garage.