Director David F. Sandberg explains the Until Dawn movie's shocking ending and the "tricky" way of how it ties into the game's timeline.

Until Dawn is a Halloween grab bag of treats moviegoers have ingested innumerable times before, although that’s not immediately clear at outset, when its protagonists arrive at the final stop on a trip designed to retrace the steps of missing-for-a-year Melanie (Maia Mitchell).