This was one of the better executed mysteries of the four I've watched recently: Top of the Lake, The Killing, Prisoners, and Broadchurch. Somehow, it got more compelling toward the end. The mystery was only the plot engine, it was really a social examination of small town life in the UK. I imagine many American audiences will find it a tad boring. BBC, after all. But if you like just straight ahead mystery stories, this one does the form quite well.