You get an answer on who the killer was in an episode before then they totally throw in a twist at the opening of the episode! That's not it though!! With about 20 minutes left in the show the writers throw a curveball and totally fool everyone! I never would of guessed it was who it was and the drama of it unfolding was just about perfect! All in all the season was amazing, Kate Winslet I feel like is made for this character and the ending couldn't of been any better! I know it's a mini series but I hope to see them in a new season!!