In 1976, British graduate student Ruth Gilmartin (Michelle Dockery) made what she hoped would be an uneventful visit with her estranged mother Sally (Charlotte Rampling). It wasn't to be, as she learned that in the '40s, the young Sally (Hayley Atwell) was a government spy who helped prod America into World War II...or that her long-buried past was about to catch up with her. Thrilling miniseries co-stars Rufus Sewell, Michael Gambon, Thekla Reuten. 185 min. Widescreen; Soundtrack: English Dolby Digital 5.1; photo gallery.