David Beckham says he owes "everything to Sir Bobby" after the Manchester United and England midfielder spotted Beckham as a youngster.
Watch the documentary on BBC World news on the following days (all times GMT): Saturday, 14 October 0130, 0830. Sunday 15 October 1430, 2030. Monday 16 October 0230 (North America & Latin America only). Tuesday 17 October 0930.