Threads (1984), while it was made for TV in the mid-80s and some of the effects are dated, there's an almost visceral, gnawing, devatastaing, haunting (choose your adjective because not one does it justice) feeling that attaches to yourself that has yet to leave me, I think about that film every few days, especially now with some of the more recent, insane developments in politics and international relations. It reinforced how absolutely fragile everything in this world is and how close a situation to today that film showed might really be. One viewing is enough for one lifetime.