A fantastically tense thriller. Does amazing work building up tension without any real action and is a great showcase for Ewan McGreggor, Pierce Brosnan and Olivia Williams. It's nice seeing McGreggor with a decent script again and it's probably one of his finest roles since his work with Boyle. Brosnan meanwhile brings a frustrated tension to his character, portraying Lang like a trapped animal.
With an amazing score, some beautiful cinematography and a fantastic final fifteen minutes this is probably one of the best thrillers in a while.