This episode tackles the mysterious phenomenon we call flavor—which is different from taste, by the way. Marc digs into the technical side of things during a chat with Bob Holmes, author of Flavor: The Science of Our Most Neglected Sense, then gets personal with Gail Simmons of Top Chef. They discuss what it’s like to recreate flavors from memory, why a cherished meal is like an ex, and how she stays objective while judging food on TV.