Jon’s friends were all wondering the same thing: What happened to Jon? And why? Keith Morrison has the full story tonight at 9/8c on an all-new 2-hour Dateline on NBC. | Dateline NBC

Friday at 9/8c on an all-new Dateline... | Dateline NBC

A strange outfit for a warm day in Hawaii… Tonight on an all-new Dateline at 9/8c on NBC. | Dateline NBC

What a day! If you missed Dateline LIVE -- our first-of-its-kind EVENT in Nashville this past weekend -- don’t worry, we’ve got you covered with the highlights! | Dateline NBC