Original air date: 12/01/2017 Runtime: 42:34 min. A mother and her two young sons vanish in rural Wyoming, prompting a nationwide search. Leads dry up and the case goes cold... until a dark secret is revealed, leading investigators to another homicide they had no clue could solve four murders.
Original air date: 12/08/2017 Runtime: 42:34 min. Ernest and Charlene Scherer are found beaten and stabbed to death in their exclusive Northern California community. At first, it appears to be a robbery gone wrong... until investigators hone in on the motive - revealing the killer's twisted double life.
Original air date: 12/22/2017 Runtime: 42:34 min. Bloomington, Illinois Sergeant Jeff Pelo is a respected police officer and at home, he's a model father and husband, so when he's caught trespassing after midnight on a young woman's property, his spotless reputation comes under fire.
Original air date: 12/29/2017 Runtime: 42:34 min. The decomposed body of a San Francisco businessman is found floating in the California Aqueduct. Investigators initially suspect a family member, but without evidence, the case goes cold. It will take detectives several decades to find the real killer.
Original air date: 01/12/2018 Runtime: 42:34 min. Mike Dixiano is heartbroken when his wife, Angela, dies from organ failure after a lifelong battle with drugs and alcohol; while friends and family grieve Angela's death, investigators can't find a death certificate and begin to suspect her husband.
Original air date: 02/02/2018 Runtime: 42:34 min. Wife and mother Stephanie Roller Bruner vanishes in a blizzard shortly before Thanksgiving, prompting officers to launch a massive search; then, the sordid details of a secret love triangle emerge, causing the case to take a twisted turn.