Two murders. Three Trials. One killer. Watch it all unfold tonight at 9/8c on an ALL-NEW Dateline mystery… | 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

Tonight on a new Dateline, the latest chapter in this hair-raising tale, featuring new evidence, explosive testimony and the prosecution's new star witness. Watch at 9/8c on NBC. | Dateline NBC

“I knew she was going to be famous and I would see her on TV.” She was right... An all-new Dateline Monday at 10/9c. | Dateline NBC

Making sense of his death was no easy task for investigators… Watch tonight at 9/8c on a 2-hour Dateline. | Dateline NBC

Friday on an all-new Dateline at 10/9c... | Dateline NBC