Since Doctor Who came back in 2005 it has evolved from being a Saturday teatime treat for British children (and their nostalgic parents) to one of the chief geek shows on TV. Heightened episode quality coupled with the increased popularity in America have turned Whovians into a force that have Trekkies quaking. Who has relished this new found popularity, becoming increasingly dual layered. While the core child audience can still enjoy the fantastical stories, episodes have hidden hints and seemingly throwaway references that provide clues for fans about where the show is heading. Unfortunately, with this comes plot threads that dont end up explored; for every reference that gets a payoff down the line, theres one that fans put weight on that never becomes anything. While this is certainly more prominent with Steven Moffats writing, its been a problem across the whole series. Coming up are nine such plot threads I doubt well ever get any resolution to, along with one long standing arc well likely get enlightened on very soon. I've decided to stick with nu-Who, primarily because this is where the continuity began to be fully chronicled, highlighting these dropped threads.