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'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 is in New Orleans, where he reveals secret menu items, including a garlic knot/nachos hybrid that's "knot" on the menu of a New York pizzeria operated out of a renovated warehouse; a barbecue surf-and-turf po'boy; and redfish on the half shell.

Adam is in New Orleans, where he reveals secret menu items, including a garlic knot/nachos hybrid that's "knot" on the menu of a New York pizzeria operated out of a renovated warehouse; a barbecue surf-and-turf po'boy; and redfish on the half shell.

Adam is in Oahu, HI, to find the best short ribs he's ever had, modestly served in a bowling alley; a New York/Hawaiian fusion pizza in an Irish pub in Chinatown; and a classic Hawaiian dish so off the menu that it was once deemed illegal.

Adam is in Oahu, HI, to find the best short ribs he's ever had, modestly served in a bowling alley; a New York/Hawaiian fusion pizza in an Irish pub in Chinatown; and a classic Hawaiian dish so off the menu that it was once deemed illegal.

Adam's hunt for secret dishes leads him to the City by the Bay, where he tries an off-menu Hawaiian/Korean mash-up, a decadent burger/pate hangover cure, and Eggs McMahon, some down-home soul food served from a hidden curbside window.

Adam's hunt for secret dishes leads him to the City by the Bay, where he tries an off-menu Hawaiian/Korean mash-up, a decadent burger/pate hangover cure, and Eggs McMahon, some down-home soul food served from a hidden curbside window.

Adam is in Las Vegas, where he explores a Chicago Mob-inspired speakeasy and its secret dish, which uses Al Capone's original marinara sauce; 2 crazy mash-up sandwiches; and a New York-style pizza joint hidden inside the Cosmopolitan casino.

Adam is in Las Vegas, where he explores a Chicago Mob-inspired speakeasy and its secret dish, which uses Al Capone's original marinara sauce; 2 crazy mash-up sandwiches; and a New York-style pizza joint hidden inside the Cosmopolitan casino.

Adam Richman hunts down sly restaurants in Chicago. He discovers a “monster” mash-up sandwich that holds the entire menu in a roll, a true New Orleans po'boy at a hot dog joint, and Chicago's “king of gnocchi” in a hidden eatery located in a residential home.

Adam Richman hunts down sly restaurants in Chicago. He discovers a “monster” mash-up sandwich that holds the entire menu in a roll, a true New Orleans po'boy at a hot dog joint, and Chicago's “king of gnocchi” in a hidden eatery located in a residential home.

Adam Richman goes to Los Angeles to find a spicy, off-menu burger at his favorite Thai joint. Then, he discovers an inside-out grilled cheese, a secret Mexican breakfast dish named after Godzilla, and a burrito that combines flavors from Peru, Korea and Mexico.

Adam Richman goes to Los Angeles to find a spicy, off-menu burger at his favorite Thai joint. Then, he discovers an inside-out grilled cheese, a secret Mexican breakfast dish named after Godzilla, and a burrito that combines flavors from Peru, Korea and Mexico.