Best known for Dads Army, in which his Sergeant Wilson played the languid, rakish foil to Arthur Lowes pompous, chippy Captain Mainwaring, John Le Mesurier was one of Britains favourite and most recognisable character actors. The epitome of insouciance and languor on screen, in real life this charming, quietly-spoken bon viveur was plagued by private turmoil and heartbreak. As Graham McCann reveals in this fully authorised and moving biography, as an actor John Le Mesurier was a key ingredient in the success of Britains greatest sitcom, but as a man he was far more courageous than Sergeant Wilson was ever meant to be.