That was only the beginning: Mary Tyler Moore had been secretly invited to appear in person! "The show Oprah considers her "biggest, fattest" mistake is also the highest-ranking episode in 20 years! "I remember he used to call me Sam to annoy me," John says with a smile. ' He'd say, 'I'm sorry, Sam.'" One unanticipated outcome of the John F. Oprah says that she never had a show make her break down crying afterward—until she interviewed Sidney Poitier.