After a brief flirtation with humor in Birdman or (The Unexpected Virtue of Ignorance) filmmaker Alejandro González Iñárritu returns to the painfully grim style of his early films (Amores Perros, 21 Grams, Babel, Biutiful). Leonardo DiCaprio plays a frontiersman leading a fur-trapping expedition in 1820 who is abandoned and betrayed by the men who hired him. What follows is an extremely brutal tale of survival and (ultimately) revenge. It's extravagantly visual and hard to look away from--but rather punishing. 156 minutes R.