Dateline NBC

When Brigida Uto arrives at an emergency room, she is near death. While her vital signs are fading, there are no signs of an infection or injury. Doctors, the FBI and local law enforcement are all called in to not only try to solve a medical mystery, but also a horrendous crime. Natalie Morales reports.

In this Dateline classic, Kevin and Morgan Mengel were happy at first, but when the marriage went bad, he went missing. Police wondered if he simply left, but a family’s relentless pursuit lead to a stunning confrontation and, eventually, the truth. Hoda Kotb reports. Originally aired on NBC December 27, 2013.

A romantic Mediterranean cruise was intended to rekindle the love between Micki Kanesaki and her ex-husband Lonnie Kocontes. But when Micki vanishes, an investigation reveals secret recordings, a surprising star witness, and an undercover hitman. Josh Mankiewicz reports.

Craig Melvin speaks with the families of George Floyd, Jacob Blake and Eric Garner about police brutality, racial injustice and a shared commitment to turn their pain into advocacy work.

In this Dateline classic, a young father in the California mountains calls 911 to report that he had been in a shoot-out with a car full of strangers. With one man dead and two others injured, authorities wonder if this was self-defense or something else. Keith Morrison reports. Originally aired on NBC on October 18, 2013.

In this Dateline classic, a football player and homecoming queen fall in love, but when the husband is found stabbed to death, authorities begin to investigate a trail of evidence. Dennis Murphy reports. Originally aired on NBC on May 21, 2010.

In this Dateline classic, Brittany Tavar disappears from her home, along with her dogs, leaving friends and family baffled and worried. Keith Morrison reports. Originally aired on NBC on March 17, 2013.

In this Dateline classic, life seemed perfect for Mark Stover. He had a successful career as a “dog trainer to the stars” on a beautiful island paradise. After a tough divorce, he’d recently found love again. Yet friends said he walked around in a constant state of fear. Could he sense the danger no one else could see? Keith Morrison reports. Originally aired on NBC on January 21, 2011.

In this Dateline classic, a young nurse in southern California is taking in the sun and surf, tackling a new job and making new friends. Everything seems to be going great for Lynne Knight until her screams shatter a summer night. Keith Morrison reports. Originally aired on NBC on October 3, 2014.

In this Dateline classic, Lisa and Scott Pattison marry on a fairy tale day and build a life together in central Indiana. But one day in July 2009, their marriage comes to a horrifying end as Scott races his gravely injured wife to the hospital, calling 911. Dennis Murphy reports. Originally aired on NBC on February 25, 2011.