Season 1 is a 9/10, fantastic characters and mystery that keeps the viewer engaged for it's 8 episode runtime. Not high art or anything but it's really really well made. Sadly the shows biggest downfall is it's own popularity. Since the show was so popular the later seasons are really concerned with pleasing the fans which leads to some hit or miss moments. That dosen't mean that the later seasons suck because they don't but it is not as good as the first.