Dateline Unforgettable - Episode Guide

A college student is found murdered and the case sits cold for nearly 40 years; Josh Mankiewicz reflects on the vow that keeps the case alive and the innovative method used to catch the killer.

An aspiring Playboy model is murdered in Miami, FL. A seven second clip of her last moments alive are caught on security video and could hold key clues. The haunting images make this case one of Dennis Murphy's most memorable.

A man claims his wife died by suicide. A suspicious house fire 24 years later raises doubts. Josh Mankiewicz remembers the suspect who could not stop talking

When a pastor loses a second wife in an accident, authorities become suspicious. Dennis Murphy returns to this unforgettable story of evil and betrayal, wondering how far this a man of God might have fallen. Dennis still can't believe the answer.

Years after a Montana man is found dead, his son searches for answers. Keith Morrison cannot forget that son who opened a box, and faced a terrifying family secret.

After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out. This hideaway may hold answers. Dennis Murphy looks back on the case that kept him guessing until its astonishing conclusion.

Gary Hilton is a name Dennis Murphy will always remember. A hiker goes missing and authorities suspect Hilton is reenacting a slasher movie. Dennis reflects on the real-life murder spree that terrorized the American South.

Keith Morrison revisits a story that has haunted him for years. When detectives find a missing woman's car abandoned on a bridge, their investigation uncovers a tangled plot involving money, friendship and a deadly betrayal.

Nathan and Denise Leuthold built their family on faith, but suddenly one of them was dead and the other was under suspicion. It's a story that stays with Andrea Canning, both because of what happened and when it happened: Valentine's Day.

A novelist's wife is found dead at the bottom of the stairs. Investigators wonder if it was an accident or murder. Dennis Murphy interviewed main suspect Michael Peterson and now returns to the case with insight only he can share.

Eduardo Valseca was kidnapped in a planned kidnapping. Keith Morrison reflects on the family he spent years trying to track down. The Valecas were not destroyed by what happened to them.

For more than 30 years, Ohio investigators have searched for answers in the murder of 10-year-old Amy Mihaljevic. The details of the case still haunt Josh Mankiewicz. Now he and investigators are enlisting your help to solve it.

An advocate for the missing Indigenous women looks into the disappearance of her niece and uncovers some issues in the law enforcement.

After a young woman's body is discovered at a trash facility, a detective promises justice and comes face-to-face with a serial killer; Keith Morrison revisits the case.

A woman finds her father, a former FBI agent, murdered at his house; after digging into his past, police suspect the killer might be close to home; for Josh Mankiewicz, the toxic marriage at the heart of this case makes it unforgettable

The heir to a legendary hotel is brutally murdered, and detectives learn he had no shortage of enemies; Dennis Murphy takes a fresh look at this extraordinary investigation, a hunt for a killer he calls the most ruthless he's ever seen.

Debbie Kelly and Lars Itzo make their marriage of opposites work; when Debbie is killed, there is no question about who shot her, yet the explanation of why is one of the most confounding Andrea Canning has heard.

Newlywed Dalia Dippolito comes home from the gym to find out her husband has been killed; in a case Dennis Murphy will never forget, almost nothing is as it seems; he explores whether Dalia was a pawn in a hoax gone wrong or simply diabolical.

A series of reports chosen by "Dateline" correspondents that answers the question they most often get asked -- what their most memorable story is and why.

Andrea Canning looks back on the royal who has fascinated her since childhood, Princess Diana. She explores Diana's real story, including a look at her troubled marriage, turbulent life and the investigation into her death.

A couple takes a scuba-diving trip to the British Virgin Islands; on their last dive, one of them surfaces but the other does not; police quickly suspect the drowning was no accident; now Dennis Murphy gives this unforgettable story a second look.

Keith Morrison recalls how a deadly high-speed chase in Montana led "Dateline" on a search to unravel a mystery unlike any he has told, one where a missionary turned into a monster and committed one of the state's most notorious crimes.

A mystery in paradise unfolds when Sarm Heslop vanishes from her boyfriend's yacht. In a case that made international headlines, Andrea Canning recounts her memorable journey searching for a particular person of interest.

A 911 call reporting an apartment break-in holds the key to solving the mysterious murder of a young graduate student named Katie Sepich; her case contained many twists, and her family's grit still astonishes Josh Mankiewicz.

When Tina Sandoval disappears, her parents and loved ones spend years searching for her; Dennis Murphy takes a fresh look at the secret Tina kept and at the demon who forced her loved ones to make an agonizing decision.

The survivor of a horrible attack is convinced the police on the case have the wrong suspect. Keith Morrison looks back on his heart-wrenching interview with the victim and her courageous quest to uncover the truth.

A Florida father is determined to find out what happened to his daughter after her fatal fall from a penthouse apartment; Dennis Murphy revisits the dramatic events as this dad confronts overwhelming obstacles to learn the truth.

When three people are found dead on the same day in a Kentucky town, investigators know that it isn't a coincidence; years pass before an arrest; Keith Morrison reflects on the triple murder that shook a tight-knit community to its core.

The fatal shooting of NBA star and hometown hero Lorenzen Wright sends shockwaves through the city of Memphis, Tenn.; Andrea Canning takes a new look at the diabolical plot behind Wright's murder and his family's tireless fight for justice.

A chance encounter on the Pacific Coast Highway with a woman he first spoke to in a jail cell leads Keith Morrison to re-examine the mysterious death of Las Vegas casino magnate Ted Binion.

When Dr. Joe Sonnier is murdered, the investigation reveals simmering jealousies and a love triangle. Andrea Canning recalls the brilliant yet humble doctor who dedicated his life to helping others

A charismatic pastor's dark secrets come to light, triggering a murder investigation. Josh Mankiewicz looks back at a case that shattered a congregation and exposed the cost of their unshakable trust.

When a woman is found dead in her SUV, the investigation into her murder reveals a tangled web of sex and lies. Dennis Murphy looks back on his unusual interview with the lead suspect.

Chris Smith's family received an email stating that he was leaving California to surf the world. Months later, they wondered if he really left. Keith Morrison offers new insights into the case.

After Lisa Zeigert is killed, her family keeps the case in the public eye for decades. Andrea Canning reflects on the harrowing mystery and discusses the inspiration she's drawn from Lisa's loved ones.

A woman in Los Angeles is killed in an apparent botched burglary; nearly 20 years later, a detective discovers a clue that turns the case on its head; Josh Mankiewicz revisits a story with a twist that surprised him.

Police investigate when the seemingly storybook romance between a football player and the homecoming queen ends in a death.

A teenager's life is turned upside down by a shocking discovery as what seems like a fatal accident reveals itself to be something much more disturbing.

When Leslie Neulander dies after what seems to be an accidental fall in the shower, her book club friends join forces to seek justice on her behalf. Andrea Canning reflects on some of the most determined women she's ever met. 

After an apparent home invasion in Minnesota leaves Heidi Firkus dead and her husband, Nick, hospitalized, detectives learn the young couple was facing financial troubles.

An investigation into the poisoning of Wisconsin mother-of-two Julie Jensen takes a surprising turn when detectives learn that she wrote a letter days before her death pointing to a possible suspect.

Two murders in Toronto ignite an investigation that spans four decades; breakthroughs in investigative genetic genealogy help crack the case.

When a pharmacist is found shot to death in his Wisconsin farmhouse, investigators embark on a 15 year hunt for his elusive killer.

A pregnant woman vanishes before her own baby shower and her worried family raises the alarm as detectives unravel a chilling mystery. For Josh Mankiewicz, it was a heartbreaking case that stayed with him long after the cameras stopped rolling.  

A former ballerina shoots her husband in what she alleges was an act of self-defense; the ensuing investigation and dramatic trial spark protests and receives national attention.

A young Tennessee woman mysteriously vanishes and misses her family's Thanksgiving dinner; determined to track her down, her family takes matters into their own hands, pursuing every digital clue she left behind.

After a nurse and mother-of-three is murdered inside her Illinois home, investigators uncover security camera footage that could be key to solving the case

The parents of Kristin Smart speak out in their first network exclusive interview since the recent sentencing of their daughter's killer