One of the most tense movies I’ve ever sat through — two hours of edge-of-your-seat dramatic tension— this film about the very grey (with burst of black) world of the American war on drugs is notable for, among other things, the high calibre of acting (primarily Benicio Del Toro and Josh Brolin, but also Emily Blunt) and its lack of heroes.  Set against the backdrop of the US—Mexican border, a naïve/idealistic FBI agent (Blunt) who volunteers for an anti-drug US inter-agency task force enters a world she had no idea would be allowed to exist.

IMDB    Rotten Tomatoes