Paul Darrow (2 May 1941-3 June 2019) portrayed Kerr Avon in 51 of the 52 episodes of Blake's 7 on screen from Space Fall the second episode of Series A in 1978 through to the final episode of Series D Blake in 1981.
He has also written two books as sequels to the series,
In the 2000's he again reprised the role of Avon for Big Finish Productions' series of Blake's 7 audio books and audio dramas.
The Classic Audio Adventures
- Avon: A Terrible Aspect (Prequel Novel)