Mr. Mercedes

This show is very hard to review because it genuinely becomes an entirely different show after the first season. Season's two and three move into a more traditional Stephen King style, while season 1 is the classic retires gruff detective no kind of a PI being haunted by that one case. And the killer communicating with him isn't anything revolutionary, but the two leads are awesome and the supporting cast is really charming and perfect.

Season 2 and 3 are really enjoyable but they are two screen seasons, meaning it's best to watch while doing a puzzle or exercising while the first season is so captivating you don't want to miss anything. Hope this helps.