I love Midsomer Murders! Not only is it decent tv, but it's fun to see all those English 'cottages' and gardens. I'm almost done with the 95 episodes on Netflix and will really miss it when I'm done.
Miss Fisher's Murder Mysteries is my absolute favorite on Netflix, but there are only a couple of seasons to watch right now. Great writing and costumes, and Phryne is a very progressive woman in the 1920s.