Kevin Davis has posted his three existing Blakes 7 documentaries to his YouTube page (the series four one was never made).
They were intended for release on the DVDs but never appeared. Various reasons have been postulated for their omission, but nothing is known for certain.
But at last they can be seen and there’s plenty of interesting material and interviews, although the lack of Paul Darrow is a shame. But the majority of the other regulars are present and the documentaries offer an honest overview of the three seasons – highlighting both their strengths and weaknesses.