Midnight is the witching hour… if you believe in that kind of thing and most people won’t admit it if they do. Midnight is the time when a door opens from our world into the next, and we are visited by the dark spirits of the shadow lands. The incubus, the succubus, the old hag. Visitors are known by many names, but each story bears the same marks. The demons come after midnight in the first three hours of the new day, when we are alone and vulnerable, deep asleep and helpless, when we cannot move. They lay on us, press on us, suffocate us. Take from us what is most precious. Our lives, our love, our sanity. Our sleep. If you believe in that kind of thing.
Terminator: The Sarah Connor Chronicles; 2.16 - Some Must Watch, While Some Must Sleep