Question: Red Mercury starred the English actor who also played whom in the Harry Potter series?
Sentence (from "David Bradley (actor)"): He is best 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".
Relevant evidence: Yes