David Bradley is an English actor and comedian. He is best known for playing Argus Filch in the Harry Potter films, though he is also an established stage actor with a career that includes a Laurence Olivier Award for his role in a production of King Lear. Other acting credits include the BBC series Our Friends in the North, the HBO series Game of Thrones, the ITV series Broadchurch, and the films Hot Fuzz and Captain America: The First Avenger. In 2013, he portrayed William Hartnell, the actor who portrayed the First Doctor, in the Doctor Who docudrama An Adventure in Space and Time. He currently stars as Abraham Setrakian on The Strain.