The origins of a real-life medical breakthrough are dramatized in this affecting film about a 1970s breast cancer patient (Samantha Morton) convinced her disease has hereditary origins, having lost close relatives to the same illness. Testing that conviction adds another layer of struggle to her battle─but she finds an ally in Dr. Mary Claire-King (Helen Hunt), whose colleagues are skeptical of her theory that genetics could hold the secret to the diagnosis. With Rashida Jones, Corey Stoll. 100 min. Widescreen (Enhanced); Soundtrack: English Dolby Digital 5.1; Subtitles: English (SDH); audio commentary; interviews.