Yes, I know it's an obvious choice, but have you watched it lately? It's tremendous fun and chock-full of goodies, from the deliberate slowness of the opening half hour or so to the gradual accumulation of strange and disturbing details as the ghost-infested fog draws in. Absurd though it may be in some respects, for me The Fog is one of the great ghost stories on film. Nautical spooks are fun, nemesis always provides a good plot motor, and the idea of supernatural forces wreaking wild vengeance on a community is now a time-honoured classic, thanks in part to Carpenter. While Halloween was vastly more successful, for me this is the quintessential story for the last days of October - it has the authentic chill of the sea about it.