A medical mystery was about to turn into a full-on police investigation… Tonight on an all-new Dateline at 10/9c on NBC. | Dateline NBC

Cheryl had a nagging feeling… Where was her daughter, Kelsey? The full story tonight at 9/8c on a classic Dateline. | Dateline NBC

Hello, from Shauna, today’s Unofficial Dateline Friday Ambassador, with a reminder we’re on at 10/9c tonight. You may have missed that part ‘cause all you heard was the ALL NEW part…. We’re baaaaaack! | Dateline NBC

Angela’s friends couldn't understand what had happened to the healthy, active, 43-year-old… Her story tonight at 10/9c on an all-new Dateline. | Dateline NBC

Stay tuned... https://www.nbcnews.com/dateline-event | Dateline NBC