Plot Synopsis

DATELINE: UNFORGETTABLE is a three-night event that delves into the cases from DATELINE: SECRETS UNCOVERED that correspondents Andrea Canning and Josh Mankiewicz just can't shake. Each night, one memorable episode of DATELINE: SECRETS UNCOVERED airs with Canning and Mankiewicz giving an inside look into why these cases personally stuck with them. Episodes include:

"Secret Lives" (Monday, March 8, 2021 at 8pm ET/PT): This story was one of Andrea Canning's first assignments for Dateline, and one she still can't forget. When Jen Ramsaran disappeared, police searched online for clues and wondered if she escaped the real world for a fantasy world.

"Mystery in Orange County" (Tuesday, March 9, 2021 at 8pm ET/PT): This was a case that stayed with Josh Mankiewicz for years. After a young Army veteran disappeared, detectives uncovered a cryptic 911 call placed 11 days before she went missing, which exposed a twisted story -- and the truth.

"The Client" (Wednesday, March 10, 2021 at 8pm ET/PT): Andrea Canning will never forget this story because of the number of twists and turns it took. Beverly Carter was a top-selling realtor who went missing after showing a house. When her friends received mysterious text messages, they knew something was wrong.