Question: What is the name of the Scottish actor who has played the part of 'Doctor Who', and who played the part of Daniel in a British radio sitcom as part of a childless couple?
Sentence (from "David Tennant"): He is best known for his roles as the Tenth Doctor in the British television series "Doctor Who", Alec Hardy in "Broadchurch", Giacomo Casanova in the TV serial "Casanova", Kilgrave in "Jessica Jones", and Barty Crouch, Jr.
Relevant evidence: Yes