Matthew Sweet talks to the singer, actor and civil rights campaigner Harry Belafonte. He tells Matthew how he and Sidney Poitier were like Apollo astronauts, sharing a pioneering role that's hard for anyone else to understand. And as British race relations films Sapphire and Flame in the Streets are re-released Matthew is joined by film historian Stephen Bourne, anthropologist Kit Davis and actress Adjoa Andoh to discuss the films.