Episode list

The theme of today's episode is The Charleston Affair.

Dateline goes to Iowa to examine the murder of expecting mother Lisa Techel who was shot to death in her home in May 2012. Police originally suspect a disgruntled neighbor, but investigators soon focus on Lisa's husband Seth after they discover several sexual texts from him to another woman. Prosecutors take him to court and after three trials convict him of murdering his wife.

A determined detective tries to crack a cold case involving a murdered nurse and scant evidence: an unusual weapon and a broken necklace.

Aspen, Colorado: a snow covered playground and safe haven for well-heeled owners and celebrities. That is until one cold February night when a frantic woman calls 9-1-1, barely comprehensible, about a discovery at a secluded chalet overlooking Buttermilk mountain. What happened?

Nancy Shore, a wife and mother, survives an attack in her home and a shot to the head; authorities search for a motive which leads to quite a few surprising twists.

In Santa Ana, California, Maribel Ramos, an ex- private in the army, calls 911 to warn officials that she would be defending herself if anything bad happened to her. Later she turns up dead.

New York, 2012: Jennifer Ramsaran, a wife and mother of three, goes missing. After five days, her van is found with her blood in it. Then she's found in a snow pack. The series of lies and betrayals to get to that point were astounding.

The 2012 murder of Amyjane Brandhagen, of Pendleton, Oregon, and the 2013 near-fatal assault of Karen Lang are profiled. Lukah Chang aka Danny Wu is charged with both crimes in 2013.

Arkansas, 2011: Marc Despain, a rental property owner, is shot dead in his home. His dad is suspected because there was bad blood between them. But the conspiracy is far more reaching than anyone could imagine.

A payroll director for a medical products company in Kentucky is murdered at her workplace. The list of suspects starts with her husband and ends with co-workers which were there when the murder was reported.

Investigators delve into the relationship between Alex Kogut and her boyfriend, Clayton Whittemore.

A loving mother, Lisa Knoefel, is viciously stabbed to death. Is the explanation for the crime as obvious as the blood drenched person walking out of the scene?

Police suspect a serial killer when two women and their daughters, Delores and Ebony Dewitt plus Karen and Karissa Lofton, are murdered.

New Jersey, 2013: Mischele Lewis, recently divorced, meets Liam Allen on a dating website. After about a year of dating, he asks to marry her and she accepts. She finds out she's pregnant after he proposes. But his mysteries are too much for her to bear before she commits to him. He claims he's a British spy and this creates strange restrictions on the relationship. So she looks through his effects and finds an ID with the name William Allen Jordan on it and Googles this name. To her surprise, she finds he's a common con man. And more.

Wisconsin, 2013: Jessie Blodgett, a high school student, is strangled. Jessie is acting in a show, and had just gone to a cast party, so the cast and crew are interviewed. No one seems guilty until another case has suspicious similarities.

The theme of today's episode is What Lies Beneath.

A Yakima, Washington real estate agent, Vern Holbrook, is murdered while showing a home.

Investigators seek answers when a prosecutor and a district attorney and his wife are murdered within a couple of months of each other.

Six survivors of the 2012 Costa Concordia shipwreck share their stories.

Violent crimes were nearly unheard of in this California neighborhood, until one morning in November when resident Lynn Schockner is found murdered. Keith Morrison reports

NBC News' Richard Engel investigates the poisoning death of former Russian agent and businessman, Alexander Litvinenko. Engel travels to London, Moscow and Rome to take a deeper look into Litvinenko's death, the murder investigation and the players involved in the case. Engel also speaks with the former Russian security agent who's now a chief suspect in the case.

When a college coed, Shelly, is found dead, police are pulled in multiple directions: a boyfriend, a roommate, and a fellow art student. Who killed Shelley?

A chronicle of the life of Robert Durst and the murders and disappearances he was implicated in.

Dateline examines the death of Rachel Winkler a California mother who was beloved by four men. The investigation into her death reopens a troubling mystery surrounding the untimely death of another woman Catherine Winkler who died on a desolate mountain trail in Georgia.

Millionaire computer antivirus pioneer, John McAfee, is a person of interest in a murder investigation.

When a successful young doctor, Autumn Klein, passes out and is rushed to the hospital, a blood test reveals cyanide poisoning, resulting in a criminal investigation; Dennis Murphy reports.

A Georgian wife attending a Valentines night rendezvous with her husband finds him shot to death. Tire tracks, cell phone records and an affair point in many directions at many suspects.

Ben Novack Jr., the wealthy heir to Miami's famous Fontainebleau Hotel, is viciously murdered and then mutilated. Financial motive is apparent but who was greedy enough to take action?

Diane Kyne is found dead in her bedroom, competing stories emerge about which of the two most important men in her life may have killed her. One of the stories must be true - but which one? Dennis Murphy reports

Bonnie Harkey controlled the family fortune and now she was missing from her home, the dead body of her caretaker left in the front door.

The disappearance of a 20-year-old honors student is solved decades later.

A foreign exchange student, Diren Dede, is killed while breaking and entering into a private residence. Was the exchange student a criminal or were the shotgun brandishing homeowners?

When Lou Castro puts together a makeshift family at Angel's Landing, he tells his followers that he is an angel that can see the future; but when a detective starts to investigate the commune, he then uncovers deadly and devastating secrets;

Tom Brokaw discusses his battle with cancer and his 2015 memoir, "A Lucky Life Interrupted". An intimate look inside Brokaw's family life, including conversations about his diagnosis with his wife and children.

A woman is murdered in a Georgia home invasion. Then her friend and neighbor is shot the following night. Investigators unearth disturbing secrets that suggest the cases may not be a coincidence.

Investigators re-open a 20-year-old murder case after a dark secret comes back to haunt a psychology professor.

The husband becomes the primary suspect when his wife disappears. Then evidence emerges that supports his alibi.

Hidden camera investigations reveal the hope and heartbreak associated with parents desperate to adopt.

In 2014, investigators follow the trail of a virtually untraceable prepaid cell phone call surrounding the death of businesswoman Peggy Nadell.

2007, Grand Junction, Colorado: Divorced, single mom Paige Birgfeld goes missing and her car is found burned but with no one inside. Then her personal belongings are found. After clearing all her ex-husbands, her 'clients' are looked at.

In 2006, 27-year-old Justine Abshire, a beloved teacher in a small Virginia town, dies as a result of an apparent hit-and-run by a mysterious stranger...until investigators start learning more about her and her husband Eric's relationship.

The affair of a 15-year-old student and a 33-year-old teacher creates an emotional courtroom battle.