I loved seasons one and two, but for some reason I did not watch season three. I saw the first episode of season four the other night and got hooked again. So, with the help of "apple tv", my ipod and my amazon prime membership, combined with our cold weather, I have been marathoning season 3. What a marvelous show! It reminds me of when my wife and I were just a young couple (in 1971) and we would watch Upstairs Downstairs together.