The final season of a series is almost always a game-changer. How well it goes over with audiences and critics can make or break the entire show's legacy. More often than not, it seems that beloved TV shows tend to suffer from poor final seasons or episodes. Think Game of Thrones, How I Met Your Mother or Dexter. In many ways, the odds are stacked against showrunners and writers when it comes to crafting the perfect ending, so this outcome isn't entirely unexpected. It's hard to come up with something that will please everyone and do justice to a series everyone loves, especially if it's very long-running.