Biography: Paul Darrow (born Paul Valentine Birkby; 2 May 1941 – 3 June 2019) was an English actor. He became best known for playing Kerr Avon in the BBC science fiction television series Blake's 7 between 1978 and 1981. His many television roles included two appearances in another BBC science fiction series, Doctor Who, playing Captain Hawkins in Doctor Who and the Silurians (1970) and Tekker in Timelash (1985). He was also the voice of "Jack" on independent radio stations JACKfm and Union JACK, whose lines included dry-witted comments pertaining to current events.