Original air date: 07/24/2017 Runtime: 42:42 min. Seventeen-year-old Chris Daigle vanishes shortly after leaving school to spend the day in Missouri City, Texas; family members and law officials spend years dissecting the weeks and months leading up to the day the young baseball player disappeared.
Original air date: 08/14/2017 Runtime: 42:41 min. When Lynda McClelland goes missing from her home in Forest Hills, Pa., she leaves behind three beloved grandchildren and a grief-stricken daughter; an agonizing search for McClelland uncovers answers that lie painfully close to home.
Original air date: 08/21/2017 Runtime: 42:34 min. Thirty-two-year-old Michele Whitaker is leading a troubled life when she disappears without a trace; her family and police investigate every possible lead for six years, then, a telephone call gives them the answers they're looking for.
Original air date: 08/28/2017 Runtime: 42:38 min. After Dena Raley-McCluskey vanishes from Modesto, Calif., investigators focus on her ex-boyfriend with whom she had a tumultuous relationship; the police are stumped for years until an unexpected break in the case uncovers the shocking truth.