Reel to Real: Favorite Conspiracy Film?

noun. Articles posted by Sleuth News from time-to-time that allows commentators to have their opinions put front-and-center on various subjects.
This is not Sleuth News taking sides in the election that seems to be devolving into a conspiracy theory, one-after-the-other. But still, it does open a good question on a unique genre. Conspiracy thrillers where a shadowy force attempts to overtake all that the common folk hold dear. How about it, Sleuth News commentators? What are some of your favorite conspiracy thrillers?