BBC documentary that celebrates the 90th birthday of British naturalist and broadcaster Sir David Attenborough. Presenter Kirsty Young interviews Attenborough in front of a live studio audience and looks back over some of the highlights of his storied career. Featuring contributions and tributes from famous and grateful admirers including Michael Palin, Chris Packham, David Cameron and Prince William, Attenborough reflects upon his film-making career, his time working for the BBC and discusses some of his plans for the future.