What's a TV show that you remember enjoying but nobody else seems to have heard of?

Shamelessly stolen from the main AskReddit but so few of the answers there cover anything uniquely from the UK, and we have a rich heritage of television history. Also because I wanted to mention the little animated Captain Pugwash which was my staple 'watch endlessly' VHS as a child, but revisited as an adult to appreciate: it was all hand-animated LIVE, with little paper cutout puppets on sliders; all the voices in the whole series were done by one guy!