Putting a sci-fi spin on the otherworldly romance of her "Twilight" series, author Stephenie Meyer creates a compelling adventure in which parasitic alien beings dubbed "Souls" have come to Earth and taken over most of mankind. When teenage dissident Melanie (Saoirse Ronan) is implanted with a Soul named Wanderer but retains her own thoughts and memories, she and her new "guest" set out to find a hidden enclave of unaffected humans. William Hurt, Max Irons also star. 126 min. Widescreen (Enhanced); Soundtrack: English Dolby Digital 5.1; Subtitles: English (SDH), French, Spanish; deleted scenes; featurette; audio commentary.