Ron Donachie (born 26 April 1956) is a Scottish actor. He has an immense list of acting roles to his name, including many UK television dramas. He has appeared in Doctor Who, Rebus and The Bill. He had a recurring role in the HBO drama Game of Thrones as Ser Rodrik Cassel from 2011 to 2012. In film he is known for his supporting role in James Cameron's Titanic. He plays Mr. McCree in the Downton Abbey 2012 Christmas Special.