In a Lonely Place, Pt. 2

S17, E6: Nikki, Jack and DS Ross find themselves under pressure to urgently close the net on a serial killer abducting young women. Concerns grow over missing Sarah, and solving her mysterious disappearance becomes an urgent priority for Nikki and Jack. Nikki's confidence in the detectives is diminished when she suspects a cover-up in the past case of a murdered prostitute and her pimp.