Stylised cross between sci-fi mystery, and psychological thriller. Gripping atmosphere is created through minimal script, slow motion action, haunting musical score and effective cinematography .... rear views, low level angles, close-ups give this film a unique quality. Confusing denouement leaves various questions. Characters, including the dog, reappear without us knowing where they had been. British actors are quality, though found their american accents slightly off-putting. Worth a watch.