The series was excellent but I was disappointed that the discs were for region 1 not region 4 despite my having bought from Amazon Australia. I was not able to watch the discs on our new 4K Panasonic Bluray player and had to watch on the small screen of my computer. We were not able to find a crack online to enable us to watch it. Very disappointing.
The first four episodes of series 20 lacked the intrigue and strong storyline of previous series. The presentation was more American style with short bursts of events that sometimes did not link together. Episodes 5 and 6 are much more like the great episodes of earlier series.