One of 2018's big hits, this drama features Richard "Robb Stark" Madden as an employee of the Royalty and Specialist Protection branch of the Metropolitan Police whose job it is to look after the home secretary (Keeley Hawes) during tense political times. It's written by Jed Mercurio, who's also the man behind Line of Duty, and it has all the same twists, turns, and unexpected moments as that show. Madden won a Golden Globe nomination for his brooding performance.
Watch it on Netflix now.