Hilton is caught, but where's Meredith? Bloody clothes and Hilton's confession confirm that she's dead. Investigators make a deal with the devil, offering no death penalty if he takes them to her body. But what about the other dead and missing hikers?

Georgia sentences Hilton to life; now Florida tries him for killing Cheryl Dunlap. We reveal his childhood and meet others who vanished; are they his victims too? We end with investigators talking about Meredith's legacy and how the case affected them.

An Alaska barista goes missing; cash is gone and surveillance video shows her walking away with a man. A text from her phone says she needs time away to think, but her dad is suspicious. Was she abducted? Police aren't sure – until a ransom note arrives.