The more time we spend with Sarah, a protagonist endowed by Wilson with a compelling mix of brilliance, righteousness, repression, and neurosis, the more we believe that she’s the kind of person who’d put her comfortable, middle-class life on the line to rescue a 5-year-old stranger. Tough and sardonic, with a touch of dissipated glamor and a strained relationship to her sweet, nerdy husband and business partner, Joe (Adam Godley), Zoë is skeptical of Sarah at first. But she soon has reason to join the search for Dinah. Some of the villains they encounter, in what turns out to be something far more sinister than a missing-persons case, are fascinatingly conflicted; others read as manifestations of pure evil.