Question: What was the name of the character played by an actor from the last six Harry Potter films in the BBC television serial "The Singing Detective"?
Sentence (from "Michael Gambon"): Sir Michael John Gambon {'1': ", '2': ", '3': ", '4': "} (born 19 October 1940) is an Irish-born English actor who has worked in theatre, television and film.
Relevant evidence: No