A food-themed episode includes: Clifton's Cafeteria in Los Angeles; chef Marcus Samuelsson; homes built around farms; the circuitous path bananas travel; the science behind why people like certain foods; salt and pepper shaker collectors; Cloris Leachman's kitchen; the popularity of juicing; boiled peanuts in Charleston, S.C.; Cuban sandwiches in Tampa and Miami; Boston cream pie in Boston.