Wendy and Jesse spend a good part of the episode saying exactly what they mean, which in this genre counts as a plot twist. The episode leans on reruns of earlier moments, which is nostalgic the first time and less so the fourth. A thread left dangling since S01E06 gets tied off at last, neatly enough to make a librarian smile. The quote everyone will remember: "What? What does that even mean?" It delivers, without fuss.