If you thought you'd tuned in to the wrong channel during the opening 10 minutes of Sunday's Season 2 premiere of The Leftovers, you probably weren't alone. The HBO drama opened with a bold prologue that seemed to be set in a pre-civilization past. To quickly recap: A pregnant woman wakes up in the middle of the night and steps over a group of sleeping cave-dwelllers to go outside to use the bathroom. The Sudden Departure happened, and I think that the No.