Film director Mat Whitecross chats about the making of The Kings, a four-part series on Showtime featuring four champions who ushered in a boxing renaissance. The series showcases the dominance of Roberto Duran, Marvelous Marvin Hagler, Thomas Hearns and Sugar Ray Leonard and their battles in and out of the ring. Touching on the politics of the 80's with Ronald Regan, social injustice and boxing's corruption Whitecross's documentary is a can't miss series.