Returning to the erotic voyeurism that was so prominent a feature of his early films, this transposition from Paris to Canada of the quite good 1904 French film Nathalie is Atom Egoyan's most watchable for several years. Julianne Moore plays a gynaecologist who hires Chloe, a top-class call girl (Amanda Seyfried, the ingénue from Mama Mia!, cast against type) to test the fidelity of her musicologist husband (Liam Neeson). Predictably things go wrong as Moore and her student son become involved with Chloe, who is not exactly the detached professional she seems. It's a sleek, detached, wintry affair, a good date movie for a couple on the point of breaking up.