Even in our small world, a great actor can be hidden from mainstream view by geography. When the 2010 Aussie crime picture Animal Kingdom banged out from Down Under, it boosted a group of veteran performers—Jacki Weaver and Joel Edgerton among them—onto Hollywood short lists. The big revelation was a slightly built actor with a weak chin, one Ben Mendelsohn, who burned a hole in the screen as a frightening psycho. Mendelsohn was over 40 and well-traveled when that film came out; he’s grabbed visible roles in high-profile movies (The Dark Knight Rises) and TV (Bloodline) since. But Mississippi Grind is the performance that erases any doubt that Mendelsohn is one of the most exciting people on screen these days.