By Boardwalk Empire's Richard Harrow is one of the most fascinating television characters we've seen - but what on earth is it like to play him?
Well one person knows - Jack Huston! And we have an exclusive clip of him talking about just how well he knew Jack - enough to predict what he was going to say!
The clip also reveals how the writers came up with Richard's iconic mask and why Jack speaks in that unforgettable way in the show.
The video is from Boardwalk Empire: The Complete Fourth Season, which is out on DVD and Blu-Ray from Monday (August 18).
