Two unsolved murders became four... The second Dateline Weekend Mystery at 9/8c. | Dateline NBC

The security footage wasn't perfect, but it helped police develop a timeline to track a killer... More tonight at 9/8c on an all-new 2-hour Dateline mystery. | Dateline NBC

The case shifted from a missing person investigation into a homicide... The full story on Dateline tonight at 9/8c. | Dateline NBC

10K views · 196 reactions | Thank you for watching tonight's Dateline, East Coast and Central! Before you go, Lester Holt has an important announcement... | Dateline NBC | Facebook

Thursday on a special edition of Dateline at 10/9c, join Lester Holt for an in-depth look at the race for a COVID-19 vaccine. | Dateline NBC

8.5K views · 101 reactions | Tonight, Lester Holt tackles the questions we all want answered surrounding the COVID-19 vaccines. We hope you'll join us for a special edition of Dateline at 10/9c. | Dateline NBC | Facebook

15K views · 75 reactions | Finally, the last mystery in the case began to unravel… Dateline new tonight at 9/8c on NBC | Dateline NBC | Facebook

12K views · 302 reactions | “Investigations like this consume you...” Watch Friday at 9/8c on an all-new 2-hour Dateline mystery on NBC. | Dateline NBC | Facebook

It was a heartbreaking discovery... Tune in Friday at 9/8c for an all-new 2-hour Dateline mystery. | Dateline NBC