A full list of all the Line of Duty characters who are linked to 'H' After six seasons, the BBC's hit police drama Line of Duty has built up a lot of characters who it likes to keep referring back to. Here's your guide to the main protagonists Jessica Sansome Many past Line of Duty characters have been getting a mention lately Want the best food, film, music, arts and culture news sent straight to your inbox?Invalid EmailSomething went wrong, please try again later. Sign up for regular updates of events happening in Wales When you subscribe we will use the information you provide to send you these newsletters. Your information will be used in accordance with ourPrivacy Notice.