SARAH’S KEY   By Gary Murray   Starring Kristen Scott Thomas, Melusine Mayance, Niels Arestrup, Frederic Pierrot Michel Duchaussoy, Dominique Frot, Gisele Casadesus Aidan Quinn and Natasha Mashkevich   Written by Serge Joncour and Gilles Paquet-Brenner   Based on...