I love the original radio version.
The miniseries was better than the big movie.
I had the opportunity to record all episodes when WBUR (PS Station) broadcast one each Saturday afternoon. I edited out the lead ins and excessive talking and have them still on CD and DVD.
I also was able to record the entire series after that and put them on DVD...Secondary Phase, Tertiary Phase, Quandary and Quintessential Phases
Of course they are all available streaming or downloadable on the 'net. But that wasn't an option in 1981.