David Croft, the comedy writer, director and producer whose hand was felt on shows as diverse as Dad's Army, Steptoe & Son, Up Pompeii!, It Ain't Half Hot Mum and Are You Being Served?, died in September at the age of 89. This special programme pays tribute to one of the true greats of British comedy. His name may not have been as well-known as those of the stars he made in his series, but his words and creativity have brought laughter to billions across the globe for more than 7 decades.