The arch and ending of each individual episode keeps you hooked. All of the actors are superb, and true. Excelente casting. The character arches are complex. The parallel worlds and the message it gives us about power, war, humanity, love and justice is pure Aristotelian tragedy. Feels like you are watching and epic of all of Sophocles plays and then some. Simply amazing. At some point the writing fell a bit on the second season, but the writers of this fourth season are kicking it up a few notches and making the story their own.