Sherlock? It's a wonderful series. Three episodes per series of episode and they're all about an hour and a half or more. They cover a lot and are typically very well done. All of it (not including this series) is on Netflix, too. I highly recommend it. In short, it's a modern take on the stories of Sherlock Holmes and Doctor Watson, and, in my opinion, they are all done spectacularly. There's only been a single episode that I wasn't huge on, but even then I ended up liking it.