Allen Leech is an Irish stage, television and film actor. Allen came to international attention as Marcus Agrippa on the HBO historical drama "Rome" and is best known for his role as Tom Branson in "Downton Abbey." Graham Moore is an American screenwriter and author best known for his New York Times Best Seller debut novel "The Sherlockian." Graham is also known for writing the #1 Black List screenplay of 2011 which is the basis for the new film "The Imitation Game" starring Benedict Cumberbatch, Keira Knightley and Allen Leech!