As Brazil prepares to host the Fifa World Cup this summer and the Olympic Games in 2016, imagine... explores the cultural and social history of the city of Rio de Janeiro.

Hailed by many as America's greatest living writer, Philip Roth, in conversation with Alan Yentob, is ready to tell the whole story in this special two-part film.

Alan Yentob talks to author Philip Roth about his exploration of some of the great themes of the American century, including civil rights, McCarthyism and the Vietnam war.

Alan Yentob meets the five surviving members of Monty Python - John Cleese, Michael Palin, Terry Jones, Terry Gilliam and Eric Idle - as they prepare to reunite on stage.