I have started collecting the Liberator chronicles and other Blake's 7 audio dramas from Big Finish. I believe I have all of them so I will take some time and go back and review the older ones, though they keep getting better and better! The scale is the same except in Liberators, not K-9's or jelloids.
Classic Audio Adventures
1.1 - Fractures 
1.2 - Battleground
1.3 - Drones
1.4 - Mirror
1.5 - Cold Fury
1.6 - Caged
Liberator Chronicles X