Alan Yentob looks at why our finest comic writers and performers are making sitcoms when it was believed the format was on its last legs. He speaks to Ricky Gervais, Stephen Merchant, Armando Iannucci, Graham Linehan, Chris Langham and the casts of Green Wing and Peep Show, and makes a surprise entrance on popular sitcom My Family.
Imagine is an Arts programme and has been classified a 15 certificate.
