Best Known for His Role as Mary’s Love Interest, Viscount Gillingham, in the Critically Acclaimed Television Series, Downton Abbey and most recently as Guy Fawkes in the BBC drama, Gunpowder, opposite Kit Harrington, Cullen is Now Gearing Up to Star in HISTORY’s New Drama Series… Knightfall Premieres Wednesday December 6th at 10pm ET/PT on HISTORY […]