So I'm late to the train, but I'm watching POI season 4 and it's better than every drama series I have seen in the past year. And yes, I do mean every drama series; game of thrones included.
Everything is so tightly managed. There isn't a lose thread or even line in this season so far. Everything moves with pitch perfect accuracy. Actions have consequences, and motives make actions. It's suspenseful, funny, sexy, philosophical and bad ass.