Paul Darrow 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 reprised the role of Avon in BBC Radio's two radio dramas The SevenFold Crown The Syndeton Experiment in the late 1990s.

In the 2000s he again reprised the role of Avon for Big Finish Productions' series of Blake's 7 audiobooks and audio dramas.