We're back with a companion to 'Muhammad Ali', an epic 4-part documentary biography of one of the best-known men of the 20th century. Fiona is joined by Sarah Burns and David McMahon, co-directors, co-producers, and writers of the epic series which screens across SBS this month, and will stream at SBS On Demand. It's a fascinating conversation about how they and co-director Ken Burns approached the task of telling the definitive story of the three-time heavyweight boxing champion who, at the height of his fame, took American life — the racism, the religious biases, the role of celebrities, the role of sports in society — and refashioned it in his own image.