Agatha Christie: Lucy Worsley on the Mystery Queen

Agatha Christie is the most successful novelist of all time, outsold only by Shakespeare and the Bible. Across 75 novels, plays and countless short stories, she revolutionised the detective genre for over a century - but the real woman behind the literary persona has long remained an enigma. Over the course of three episodes, Historian Lucy Worsley turns her powers of investigation onto Agatha herself.