It says much for the fuzzy nostalgia surrounding Dad's Army that this is the third of four retrospective docs to mark the sitcom's 50th anniversary. This time, Alexander Armstrong goes behind the scenes and learns how the lovably pompous Arthur Lowe had much in common with Captain Mainwaring.

Inside the new documentary celebrating Dad's Army

Rare archive footage, cast and crew interviews - and a little help from Radio Times - elevate this 50th anniversary series on Gold.

Don't panic! To mark the 50th anniversary of one of the UK's most beloved - and most repeated - sitcoms, Alexander Armstrong hosts this four-part deep dive into the Home Guard hit. This first instalment details the show's wobbly start, from casting tensions to battles over the iconic title sequence.