The post-Watergate interviews between David Frost and Richard Nixon were first dramatised back in 2006 with Michael Sheen as the jet-setting talk-show host. So who better than Sheen to celebrate Frost's five decades in the media on both sides of the Atlantic in this one-off documentary? We hear from Frost himself who recalls a career that takes in That Was the Week That Was, The Frost Report and TV-am, while friends and colleagues, including Michael Parkinson and Ronnie Corbett, give their verdict on the only person to have interviewed the last seven US Presidents. The catchphrase may be much mimicked, and the softly-softly approach of more recent ventures like Breakfast with Frost has been criticised by some, but there's no denying the staying power of this giant of broadcasting.