I still enjoy the showes because I enjoy the acting and think the individual episodes are always written well. But the show has obviously failed as a coherent narrative since the principal "mysteries" of the show seem to undergo constant reinvention. As for the season finale, while I wasn't surprised by any of the "twists", I was still entertained.
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Antonio Gramsci wrote:
The crisis consists precisely in the fact that the old is dying and the new cannot be born; in this interregnum a great variety of morbid symptoms appear.