Hilary (played with just the right mixture of adoration and masochism by Rachel Griffiths) was a gifted child musician herself until Jackie eclipsed her glory. Dropping out of the music world, Hilary settles into domestic life with her adoring husband (David Morrissey). But even then she is forced to share when Jackie, fleeing her marriage to the pianist-conductor Daniel Barenboim (James Frain), descends on her country home and begs to share Hilary’s husband’s bed. Told from both women’s points of view, this fascinating, if sometimes overwrought, tale packs a wallop. Watson’s bravura performance shows us the agony, the ecstasy and the ruthlessness of genius.