James Martin's American Adventure takes the chef to the city of San Francisco. James arrives on a boat through the bay before cooking on the great historic warship the SS Jeremiah O'Brien. James then takes a walk on foot through San Francisco's famous Chinatown and explores the many food stores offering unusual ingredients to the thousands of shoppers that visit every day. Those with a sweet tooth are also catered for in this episode with an exclusive look at the Ghiradelli Chocolate Festival.