Our critic's selections for weekend films

Clive Owen is an MI5 officer and Andrea Riseborough an IRA sympathizer in "Shadow Dancer."

Before Midnight Julie Delpy and Ethan Hawke return as Celine and Jesse, the young strangers on a heady Viennese walkabout in 1995's Before Sunrise, the couple sharing a rueful Paris reunion in 2004's Before Sunset. Now they are partners, with twin girls, on vacation in Greece, and facing the everyday realities of a relationship, trying to balance careers with filial responsibilities. It's talky, and exhilarating. R

Shadow Dancer Andrea Riseborough gives a fierce, focused performance as a woman in 1990s Belfast who plants a bomb for her IRA cohorts, and then is urged to turn against them by an MI5 officer (Clive Owen). A slow-burning drama, thick with deceit. R

Stories We Tell Actress and filmmaker Sarah Polley investigates the life of her mother, Diane, who died when Polley was 11. An extraordinary documentary meditation on family, memory, truth, love, fidelity - at once intimate and personal, and universal. And tricky, too. PG-13