This psychological thriller features a tour-de-force performance by Christian Bale as an emaciated chronic insomniac - a role for which he intentionally lost 63 pounds in body weight, a record for any actor for a single movie.
The plot is really just another variant of the "is the main protagonist going mad, or is someone gaslighting him?" trope. If anything, the climactic revelation feels a little underwhelming after all of the build-up. Nonetheless, Bale's believable and engaging turn, the striking near-monochrome visuals and Roque Baños's stirring score (with a distinct Bernard Herrmann influence) ensure that it has all been delivered with plenty of style. There's also some good supporting work courtesy of Jennifer Jason Leigh, Aitana Sánchez-Gijón, John Sharian and Michael Ironside.