What makes you laugh? It is always easier to describe humour than to analyse it. Marty Feldman, for many years a successful comedy writer before his more recent activities as a performer, prefers to look at humour through the people who create it, comparing their traditions, motivations, and anxieties with his own. Among the people he talks to are: Peter Sellers, Sandy Powell, Eric Morecambe, Peter Brough and Archie Andrews, Dudley Moore, Annie Ross and Jon Hendricks, Johnny Speight, Denis Norden, Barry Took.