David John Bradley (born 17 April 1942) is an English actor. He is known for playing Argus Filch in the 'Harry Potter' film series, Walder Frey in the HBO series Game of Thrones and Abraham Setrakian in The Strain, although 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 ITV series Broadchurch (for which he won the best supporting actor award at the 2014 British Academy Television Awards), and the films Hot Fuzz, The World's End and Captain America: The First Avenger.
In 2012, he played Solomon in the episode of Doctor Who called "Dinosaurs on a Spaceship". In 2013, Bradley portrayed William Hartnell in the Doctor Who docudrama An Adventure in Space and Time. He returned to Doctor Who portraying the First Doctor in "The Doctor Falls" and the 2017 Christmas Special "Twice Upon a Time". He also portrayed William Hartnell's First Doctor in a series of audio stories released by Big Finish entitled The First Doctor Adventures starting in January 2018.