[octobercountry]

From what I understand, the series was shot on 35mm film and finished on tape (as was common during this time period). So the question is, are the blu-rays upscales which are sourced from the standard definition tapes, or have the episodes been rebuilt so as to be in true high definition?

If this was finished on PAL video, the native detail would be limited to the 576 active lines of resolution the system features. Best case scenario, however, is a new scan from the negatives with re-done effects shots. Don't know if there's any chance of that happening---though with a total running time of only about five-and-a-quarter hours, it seems like it's doable, if the negatives are still around.