Dateline: Unforgettable Episode Rating Graph

Keith Morrison reflects on the case of a Chicago woman from a big family who went missing. Investigators began to suspect a man in her life was full of secrets.

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.

Andrea Canning reflects on this cautionary tale that still inspires her today. A man steals millions of dollars conning women and businesses over 25 years. One woman brings together a group of his victims to hold him accountable and face justice.

When Jen Ramsaran disappeared, police searched online for clues and wondered if she escaped the real world for a fantasy world; journalist Andrea Canning covered the case in one of her first assignments for "Dateline."

The murder of 19-year-old Alaska Native Sonya Ivanoff jolts the small coastal city of Nome, Alaska; the story sends Josh Mankiewicz to the most remote place he's ever been for "Dateline."

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.

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.

A Mediterranean cruise meant to rekindle the love between a woman and her ex-husband leads to her disappearance; the investigation reveals secret recordings and an undercover hitman; Josh Mankiewicz reflects on the cold-blooded crime.

When an Iowa woman is attacked while home alone with her three children, the confrontation turns deadly; Dennis Murphy examines one of the most sophisticated criminal plots of his "Dateline" career.

It's a mystery that defies easy answers, and "Dateline" has been following it for more than a decade; Steven Avery and his teenage nephew were convicted of killing Teresa Halbach; now, Andrea Canning shares her insight into the controversial case.

An advocate for missing and murdered Indigenous women searches for answers in the disappearance of her niece and exposes cracks in law enforcement. Andrea Canning looks back on this important story, one that became her passion project.

A case Keith Morrison can't forget in which a teen's murder shakes a Nevada community and two unlikely people confess.

A man charged with murder claims it was impossible for him to have committed the crime. For Dennis Murphy, the surprising courtroom strategy provides a memorable twist.

In Los Angeles, newlywed Sherri Rasmussen is killed in an apparent botched burglary in February 1986; 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.

Chris Smith's family receives an email stating that he is leaving California to surf the world; months later, they wonder if he really left. Keith Morrison offers new insights into the case.

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.

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 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.

Keith Morrison recalls how a deadly high-speed chase in Montana led to a mystery, where a missionary turned into a monster and committed one of the state's most notorious crimes.

For a group of stage actors, life seemed to be imitating art in the worst way when a college student was killed.

They were two beautiful families living out their dreams, but gunshots in a parking lot revealed an ugly truth. Detectives uncovered three lives tangled in a love triangle. Keith Morrison finds the tale of deceit and betrayal unforgettable.

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.

For Keith Morrison, this case stands out as an unusual mystery. The crime seemed arbitrary with no apparent motive. There was a confession which might have ended the investigation, but that was only the beginning.

After shedding hundreds of pounds, a popular kindergarten teacher goes missing. Investigators find a link between her weight loss and her disappearance. The case ranks as having one of the craziest motives Andrea Canning has heard.

A detective makes it her mission to find dozens of women who vanished on the streets of Albuquerque, New Mexico. For Josh Mankiewicz, her resolve makes this story unforgettable.

Andrea Canning recalls a case in which investigators set up an elaborate sting operation to stop a murder-for-hire plot.

Investigators track down a suspect in the disappearance of a celebrity dog trainer. Keith Morrison reflects on the fractured love story at the center of this mystery.

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.

For more than 30 years, Ohio investigators have searched for answers in the murder of 10-year-old Amy Mihaljevic; the case details still haunt Josh Mankiewicz and investigators, who ask for help in solving the crime.

The children of an Oklahoma pastor survive the robbery that took their parents' lives; it's a story Keith Morrison still can't forget, and one where the very best and worst of humanity are both on full display.

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.

When a Kansas prisoner escapes in a van driven by a volunteer, investigators scramble to track down the pair; Andrea Canning likens this story to a bunch of Hollywood blockbusters rolled into one, but it's as real as it gets.

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.

A double homicide in upstate New York leads detectives on a cross-country investigation; Dennis Murphy reflects on a story full of twists and turns, including the surprising suspect at the center.

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

After a young Army veteran disappeared, detectives uncovered a cryptic 911 call placed 11 days before she went missing, which exposed a twisted story — and the truth; reporter Josh Mankiewicz recalls the case.

Andrea Canning recalls the twists and turns in the case of Beverly Carter, a top-selling realtor who went missing after showing a house -- when her friends received mysterious text messages, they knew something was wrong.

The case involved detective work so unique, it managed to stay with Dennis Murphy for years; days before Christmas, Michelle Martinko was visiting the mall when she was found stabbed to death; investigators found her killer almost 40 years later.

Andrea Canning reflects on a case fueled by a rage so hot, it is seared into her memory; the battle between a wife and a mistress for one man's heart led down a deadly path, to a showdown on the highway.

Aaron Fraser was 3-years-old when his mom disappeared. Authorities believed that he witnessed her murder, yet the truth stayed buried. Haunted by the memory for more than two decades, Aaron eventually made a discovery that unlocked the mystery.

Keith Morrison won't soon forget a frantic three days in 2016, when a woman's disappearance in Oregon set off an intense manhunt. The suspect's 60-hour crime spree included carjacking, abduction and murder.

Against all odds, a young woman survives a brutal attack on her and a friend in a park, and while DNA points one way, a bombshell message points another.

Keith Morrison looks back on this haunting mystery he reported on for more than 10 years. A pilot flees following a plane crash, becomes a fugitive and lives a double life for decades.

A couple who made a fortune in gold was headed for divorce when the wife was murdered. How she was killed made this case unforgettable for Josh Mankiewicz. A video that seemed to provide an alibi ended up pointing police to the killer.

Josh Mankiewicz wanted to return to this case because the very thing Christina Morris feared most became her living nightmare. She went out with friends and vanished. Police questioned everyone, hoping the truth would lead them to her body.

A mother and son die in a house fire. A man confesses to their murders, but later says he was coerced. Keith Morrison returns to the case for an extraordinary look at the interrogation and the circumstances that could lead to a false confession.

A case Andrea Canning will never forget, because it revealed an unbelievable blind spot in law enforcement. Reagan Tokes worked a late shift at a local restaurant, then went missing. What happened to Reagan left her family and a city outraged.

Josh Mankiewicz returns to a case with a twist no one saw coming, including him. A popular teacher was killed in her home. There was an arrest, a trial, and a verdict. Then came the bombshell that gave a convicted murderer his chance at freedom.

A beloved couple was found murdered among a lifetime of valuable collectables in their home, an extraordinary place Dennis Murphy wanted to look back on. Investigators wanted to know if there was a connection between the memorabilia and the murder.

When a police officer's wife is shot to death in her bed, her parents' certainty that investigators have it wrong and their determination to untangle the mystery, makes the case unforgettable for Josh Mankiewicz.

This case has stayed with Dennis Murphy since he first reported on it: A determined young woman searches for answers in her mother’s mysterious death. Her decades-long quest leads to a dramatic courtroom decision.

A wife calls 911 to report her husband has been shot on a country road in Texas. What she told investigators next makes this case memorable for Josh Mankiewicz.