I was just thinking about Danger UXB recently and remember watching it on PBS with my Mom. Another show of that era that I remember loving was the miniseries of the Barchester Chronicles (adapting the first two of Trollope’s Barsetshire novels). During the DVD-by-mail era of Netflix, I revisited that one and it still held up, although I did not at the time realize just how star-studded the cast was.
I should mention that all of the programs that I mentioned are things that I watched for the first time about 7 years ago at most. So in my case, nostalgia doesn't play into it. There aren't many things that I watched as a kid that I'd consider brilliant today. The (original) TV series of Das Boot comes to mind and Todesspiel, a docudrama about a crisis situation with the RAF aka Baader-Meinhof group, of the eponymous effect ;)