Kicking off the list is James D'Arcy who is best known for his roles in Secret Diary of a Call Girl and P.O.W. He's a newbie on the Broadchurch block as he's joining the show to play a 'key role' in its second series. Not a lot is known about his character but he'll be recognised - or at least his voice will - by Doctor Who fans for his portrayal of Michael in the Big Finish audio adventure Paradise 5. Speaking of Big Finish alumni...