Spoiler alert! Like most trailers advertising psychological thrillers in which MAJOR PLOT TWISTS occur, the new one for Martin Scorsese's Shutter Island — about a U.S. Marshall investigating a disappearance at an island-based psychiatric hospital — probably shows too much. Actually, it definitely shows way too much. Even if you've not read the Dennis Lehane novel upon which it's based (the book totally gives away the ending, by the way), we'd imagine you could still glean big spoilers here, so we'd almost advise that you not watch. It probably suffices to say that Shutter looks like a nice change of pace for Scorsese (even though it stars Leonardo DiCaprio) and it'll be out in October. Click to watch!