Just another thing worth mentioning is this. The first couple of episodes of series 4 have a couple of scenes which haven't transferred well to Blu-ray and are not that much better overall. But Justice and White Hole had no graininess and looked really good. Additionally, although the series 1-8 Blu-ray set has dropped out of the TV chart top 50 media sales, it at least has just about remained in the Blu-ray sales chart at number 78. I suppose it is old material and there has been some poor reviews - so far I am rather satisfied with it though - so I guess you have to accept that is why really and at least it was in a fairly decent position originally.