Episode 1
A love triangle leads to years of stalking, property destruction, threats, and murder.
Episode 2
When a mother of four dies unexpectedly on Valentine's Day, her death is attributed to natural causes, but a detective suspects that someone murdered the woman.
Episode 3
When a model and up-and-coming YouTube celebrity turns up dead, police question her husband in the hope he can shed some light on the situation.
Episode 4
As a murder victim's sisters dedicate themselves to finding the killer, an unexpected source turns the case upside down.
Episode 5
A community comes together to search for a young woman who goes missing from a Halloween party.
Episode 6
A young father's murder at work leads investigators to deep secrets about sex, friendship, religion and family.
Episode 7
Author Rachel Jeffs talks about what it was like to grow up as the daughter of the self-proclaimed prophet of the Fundamentalist Church of Jesus Christ of Latter-Day Saints, Warren Jeffs.
Episode 8
An investigation of a woman found murdered in Fort Worth, Texas.
Episode 9
A comprehensive look at the 1989 murders of José and Kitty Menendez by their sons, Lyle and Erik; featuring interviews with key players in the case, including Lyle Menendez.
Episode 10
An anonymous letter leads authorities investigating the poisoning death of a chiropractor to an unlikely suspect.
Episode 11
A small-business owner and his bride are murdered shortly after their wedding; police suspect a family feud is the cause.
Episode 12
A look at the case of con man John Meehan, including interviews with his wife and her daughter, his ex-wife, law enforcement officers, and the Los Angeles Times reporter who shined a spotlight on the story.
Episode 13
A couple's anniversary celebration ends in murder during what appears to have been a home invasion, but investigators believe the suspect might be connected to the victim.
Episode 14
Brandy Daniels believed someone was stalking her. Then, the single mother was found slumped over in her car, shot dead. Investigators would spend years navigating the twists and turns searching for her killer.
Episode 15
A murder outside Pleasantville, Iowa, divides a family and forces one man to take the investigation into his own hands.
Episode 16
When a young mother disappears after leaving her infant in the care of her local pastor and his wife, Florida detectives search for her for five years, uncovering a web of secrets and lies.
Episode 17
When a young Army medic based at Ft. Bragg, N.C., goes missing, police can't solve the case despite having a suspect until an unorthodox private investigator steps in to help.
Episode 18
A former marine who once was the hero for a woman in an abusive marriage may have let his desire to help go too far.
Episode 19
A woman's death is initially ruled a suicide, but when a new investigation begins, police begin to suspect murder.
Episode 20
When dozens of homeowners find themselves on a Napa Valley hilltop surrounded by fire, two teams of daring chopper pilots risk their lives in a mission to rescue them.
Episode 21
When a complicated Texas love triangle ends in murder, a pink gun leads to an arrest, until new evidence prompts investigators to rethink the case.
Episode 22
Former DEA agent Andrew Hogan details his search for Mexican drug lord Joaquín "El Chapo" Guzmán with never-before-seen videos and photographs.
Episode 23
When a young Florida law professor is shot, baffling his family, friends and police, a complicated investigation leads police to a surprising theory of the crime; the victim's family speaks out for the first time.
Episode 24
Four families that barely escaped the catastrophic Montecito, Calif., mudslides alive, and the rescuers who risked their own lives to help.
Episode 25
A bizarre cyber-revenge case lands a young woman in jail; an unexpected twist reveals the real culprit.
Episode 26
A Tennessee resident is murdered in her bedroom; investigators have little evidence and struggle to find answers.
Episode 27
Former USA Gymnastics national team coordinators Bela and Martha Karolyi talk with Savannah Guthrie about the Olympic sex abuse scandal; Olympic gold medalist McKayla Maroney describes the sexual assault she endured.
Episode 28
The disappearance of a young woman from Bend, Ore., leads to an intense manhunt after the suspect embarks on a two state crime spree.
Episode 29
When one woman breaks off her relationship with a boyfriend she says abused and stalked her, he moves on to something even worse.
Episode 30
After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out that may hold the answer to her disappearance.
Episode 31
Rapper Meek Mill interview; exploring controversies surrounding the criminal justice system, including the parole system, wrongful convictions, challenges faced by law enforcement, alleged police abuse and more.
Episode 32
When a young woman is found dead in a field on the outskirts of Green Bay, Wis., a fitness tracker helps detectives solve the mystery.
Episode 33
In a suburb of Toronto, a family lives in fear as one relative after another is found dead over the years in the same house.
Episode 34
A look at the future of marijuana in the United States, including state-of-the-art science and interviews with patients, their families, leading scientists, doctors, federal legislators and a former professional football player.
Episode 35
Interview with Andrea Constand, the first woman to pursue charges against Bill Cosby, and four other Cosby accusers who testified against him.
Episode 36
Sixteen parents fighting to end college hazing at fraternities speak out together for the first time; cases of alleged hazing at various universities.
Episode 37
A recent law school graduate in Georgia who has a promising future disappears without a trace.
Episode 38
A father in Hawaii tackles setback after setback in his fight for justice for his murdered daughter.
Episode 39
A woman's DNA test sends her father halfway around the world to confront his past.
Episode 40
When a prominent attorney claims to have accidentally shot his wealthy wife, the local prosecutor questions his story.
Episode 41
The reality of life along the U.S.-Mexico border, including interviews with families seeking asylum, news on the controversial policy of separating migrant families, and fact checks on claims made by both political parties.
Episode 42
A woman whose ex-husband killed six people in Arizona, allegedly targeting individuals with connections to their divorce; interviews with experts on the topics of domestic violence and mass murder.
Episode 43
A husband convicted of murdering his wife is granted parole; others fear he may kill again.
Episode 44
An in-depth look at the journalists who exposed the dangers of cult leader Reverend Jim Jones; interviews with witnesses to murders carried out by Jones' followers.
Episode 45
A popular high school student is found murdered in her bed; two students help police solve the case.
Episode 46
When two mothers meet after one of their sons disappears after a college party, their search for answers leads them down an unexpected path.
