For me this movie is one of the best movies released in year 2011. I don't watch too many Action movies, but this one was amazing. Before you read this review and before I spoil you the story, watch the movie, I highly recommend it. Remember, no matter what, you have to watch Unknown online. What determines the phenomenon of this movie? It's realism, taking care of psychological probability?. Write in comment how much you liked it and what's your rate.