I remember (just about) when Upstairs Downstairs was originally shown, but I was too young to appreciate it and remember the storylines. ITV3 began showing repeats and are now in the middle of the third series - this means sadly, that the previous reviewer has spoiled a plot line for me as I am watching the episodes in order. The previous reviewer gives away a plot in series four (without giving a spoiler warning), so if you haven't watched up to this point yet, avoid reading too far in this person's review. Watching the repeats made me want to buy all the discs of the series and watch all the hours of this wonderful programme again, as I knew it would not be money wasted. This is a series that even makes me get up early on Sunday mornings instead of having a lie in! It is that good.
The cast are all faultless and the contrast between what life was like for people such as the Bellamy family and the servants is very evocatively portrayed. If one didn't appreciate modern life before watching this series, one certainly would afterwards. A true classic. Classic is an overused word, but an entirely proper one to describe this series.