I've just finished It's a Sin too - even more behind, but I'd done a series record on my HDR and forgotten it was there! Wonderful drama, but utterly heartbreaking, I had to stop watching it in my lunch breaks because I'd have red eyes in afternoon meetings! It's a story that needed to be told, pretty disgraceful that the BBC thought it too controversial to pick up and C4 eventually cut it down from 8 to 5 episodes. Definitely recommend it to anyone who's not seen it yet, I think it's on All 4 still. There's a good Easter Egg for Doctor Who fans as well! It's not an easy watch mind, I've a couple of friends who couldn't get to the end, but it's the story of a lost generation and I for one am glad I stuck with it.