Alexander Armstrong begins a 50th anniversary celebration of Dad's Army by looking at the inspiration for the show and how it made it to the screen. Alongside fascinating and entertaining archive material, the show features interviews with actors from the very earliest episodes, members of the production team who were there when it all started and a veteran of the real Home Guard.

Alexander Armstrong continues this 50th anniversary celebration of Dad's Army by looking at the heyday of the show. He meets Dad's Army vicar Frank Williams, explores the impact of the show on the lives of its stars and we hear from Hugh Dennis, Jon Culshaw and other comedy stars of today who grew up loving Dad's Army.

Alexander goes behind the scenes to discover just how Dad's Army was made. He meets locals from the Norfolk town of Thetford, which stood in for Walmington-on-Sea, and we hear from the expert professionals who brought Jimmy Perry and David Croft's ambitious ideas to the screen.

Alexander Armstrong looks at how the show transferred to the radio and to the stage before finally coming to an end on television - only to live on in the hearts of its millions of fans.