In a special programme to end this series, Mary is in conversation with British writer Jed Mercurio. He’s the mastermind behind hit show Line of Duty, returning for a new series in the spring, and has a rich back catalogue of attention-grabbing TV drama including Bodyguard, Cardiac Arrest and Bodies. How much does his early medical and military training inform his writing? And how much drama does it take to make real events into unmissable television?