Friday on a 2-hour Dateline mystery at 9/8c, go inside the investigation for the first time... | Dateline NBC

“It was horrible. Worst thing I've ever seen.” The full story, tonight on an all-new 2-hour Dateline mystery at 9/8c on NBC. | Dateline NBC

Investigators walked into a mystery that would turn their world upside down… Watch tonight at 9/8c on a 2-hour Dateline Weekend Mystery on NBC. | Dateline NBC

3 successful women. 3 victims. 1 evil connection. Andrea Canning brings you the full story tonight on a classic Dateline at 7/6c. | Dateline NBC

A monthslong hunt for two killers led detectives to the last person anyone expected... Andrea Canning reports tonight at 9/8c on a classic 2-hour Dateline. | Dateline NBC

Tonight on a Dateline Weekend Mystery at 9/8c, Dennis Murphy has all the details on the murder that Cedar Rapids, Iowa never forgot... | Dateline NBC

A killer was on the loose… The full story tonight at 9/8c on a Dateline Weekend Mystery on NBC. | Dateline NBC

The case shifted from a missing person investigation into a homicide... The full story on Dateline Sunday at 7/6c. | Dateline NBC