From beatnik to mod, from folkie to disco tart, from glam rocker to, most recently, crooner of American standards, the newly ennobled Sir Roderick Stewart has had a remarkable musical journey. Alan Yentob visits Rod at his homes in Beverly Hills and Essex and talks to his friends and family, including all eight children aged from two years old to 50.Featuring rare archival footage of Rod when he was barely out of his teens and living above his parents' north London sweetshop, in a revised repeat Imagine examines an entertaining career across five musical decades.