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A young, physically fit woman dies suddenly. Family and friends are told it was a freak accident in a gym, the kind of thing that could happen to anyone. Equipment does, at times, malfunction, but so do relationships.

Part 2 of a report on the "Son of Sam" case suggesting Berkowitz was involved with a satanic cult; a 45-year-old Englishwoman's search for her American father; the hunt for two men suspected of insurance fraud; and the kidnapping of a Mississippi woman.

A 1986 San Quentin escapee who's still at large; the murder of a 4-year-old Philadelphia child; a Nebraska woman who disappeared in 1987; and an Oregon man who absconded with investors' money.

The suspected murders of two priests; the good fortune of the family of a boy who found an oddly marked rock; the disappearance of a man after he used an automatic teller; the death of a 17-year-old Ohio youth after a Halloween party.

Segments detail a serviceman's claim of an encounter with a UFO and include a discussion of experiments involving non-Earthlings. Also: the search for suspects in an allegedly witchcraft-related killing of an Arkansas man.

A teenager who was in a coma for three months following a motorcycle accident; a fatal house fire in Indiana; the killing of sea lions in Redondo Beach. Also: an update on the murders of two Tennessee women.

A 10-year-old girl is slain near Naperville, Illinois. Also: pets that sense when people are in danger.

A teacher is abducted, raped and murdered; a woman and her daughter vanish following a date with an unidentified man.

A motorcyclist vanishes while riding his restored bike; a paranoid-schizophrenic woman is accused of murdering her boyfriend.

A woman vanishes after recovering from a motorcycle accident in San Francisco; a convicted murderer presents an alibi and evidence that suggest his innocence in the deaths of two friends.

A 14-year-old vanishes after attending a party far from home; children discuss their past lives. Also: the motivations behind serial killers.

A teacher's abduction. Also: a man kills his mistress and vanishes; a burglary results in a deputy's murder.

In the series opener, UFO sightings over Florida; an escaped murderer; a divorced mother who vanished while dating someone from a personal ad. Robert Stack is the host.

Tension develops between two brothers who were arrested for the murders of four women. Also: an inmate discovers he has an incredible talent; two female inmates fight; and one of two friends suffers a tragedy.

In 1976 Leslie Penrod Harris storms out of a restaurant after an argument with her husband. Hours later her body is found near El Toro Air Base.

December 1987 in Ohio the nude body of 17-year-old Barbara Blatnik is found face down on a rural road. She had been violently raped and strangled.

In 1988, Janet Tinsley reports her 8-year-old daughter April missing after she fails to come home. Three days later, a man discovers her in a ditch.

The stories of inmates whose sentences were extended due to infractions while incarcerated. Included: a car thief sentenced to 18 months who's now serving 16 years after committing aggravated battery on an officer on three separate occasions.

The trouble that erupts in all security levels at the Penitentiary of New Mexico is examined. Included: a level 6 inmate who crafted a weapon out of candy; hearings used to determine which security level inmates will be housed in; the level 2 dorm.

The murder case of a young mother is reviewed after nearly three decades later, as small traces of DNA evidence could finally help solve her murder.

Two decades after the murder of a woman police are led to a small, overlooked piece of evidence that points directly to the killer.

A couple that loved hunting leads people to think whether an incident was accidental or not because some saw a marriage in trouble.

A murdered woman whose insurance policy caused a family rift; a man who disappeared after using an automatic teller machine; a Hungarian immigrant who's looking for the US soldier who befriended him in a refugee camp.

The bizarre death of a California disc jockey; the disappearance of a Pennsylvania man; and an alleged swindle in Florida. Also: an update on the case of an Oregon businessman who vanished with investors' money.

The disappearance of a teenager at a carnival; the search for a policeman's killer in Virginia; the hunt for missing shrimpers in the Northwest. Also: an update on a WWII soldier who's been reunited with an Austrian family he helped.

An infant abducted from a New York City hosptial in 1987; the Bald Mountain Shooters.

The hunt for the killers of a former monk; markings on the surface of Mars; the murder of a 16-year-old girl abducted from a Las Vegas supermarket. Also: evidence suggesting two Frenchmen flew across the Atlantic two weeks before Lindbergh.

Lawyer John Sutton and his wife Susan are murdered in their million-dollar Florida home.

When college student MacKenzie Lueck vanished from a park in Salt Lake City, her friends were dedicated to finding answers. The search made national headlines and the investigation revealed a secret that stunned even her closest friends.

The bathtub drowning of a newlywed woman is investigated.

Detectives in Washington D.C. discover a puzzling connection between two women who disappeared two decades apart; an investigation reveals a sinister secret hidden along one of the busiest stretches of interstate in the country.

The stories of inmates whose sentences were extended due to infractions while incarcerated. Included: a car thief sentenced to 18 months who's now serving 16 years after committing aggravated battery on an officer on three separate occasions.

In 1963, the body of a toddler is discovered in the Keene Creek reservoir in Ashland County, Oregon, wrapped in a bundle of bedding. The child is determined to a white male, possibly having Down Syndrome. Despite the limitations of forensic science at the time, investigators are determined to find out who the so-called "Boy in the Bundle" is, and how he ended up in the water. After nearly six deca

Niles, Michigan 1987, Terry Wood comes home to find his wife Roxanne lying dead in a pool of blood.

2001, Greeley, Colorado, a 7-year-old girl is walking to school with her 8-year-old brother when an unknown assailant snatches her off the street and bundles her into his car.

A rookie corrections officer at the Penitentiary of New Mexico deals with inmates in the lockup units of levels 5 and 6.

An assault by gang members on a corrections officer leads prison officials to initiate a shakedown. Included: an inmate placed in protective custody for five years; how the constant threat of attack wears on the officers.

When a woman was found dead, police collected DNA, but it didn't match anyone in the system. Twelve years later, a hit: but the man was thousands of miles away and, as it turned out, prosecutors would need more than DNA to convict a killer.

The residents of an apartment building begin to suspect that they're pawns in someone's game.

He dreamed of being the next Steve Jobs. But his world came to an end one morning with four gunshots. This was a crime of passion?a fatal triangle involving a husband, a wife, and a boss.

A visit to Alcatraz in San Francisco Bay to examine the 1962 escape of three inmates and recall the legends of "the Rock" such as Al Capone and the Birdman of Alcatraz. Also: the search for a California couple who are suspects in an attempted-murder case.

A clumsy bank robber; an underground drug route between Mexico and the US; alleged paranormal events in a Texas subdivision.

A purportedly haunted ranch in Texas; an abandoned car and its missing driver; claims of corruption at a California prison. Also: a doctor raises suspicions.

A Wyoming amnesiac; two jailbreaks; a double homicide in Oklahoma. Also: a cyanide-laced potion kills five on St Croix.

An Oregon murder probe. Also: a hacker penetrates the CIA; a site of Old West gunfights is visited; bank robbers take hostages to execute their crimes.

The story of Rebecca Musser vs. Warren Jeffs, one of the FBI's most notorious fugitives. Rebecca, a former member of the Fundamentalist Church of Jesus Christ of Latter Day Saints, opens up about life in the church, having to share her husband with more than 60 other women and why she decided to leave the denomination.

What really happened to a woman that slipped over the edge of a cliff is investigated.

Lester Holt spends two nights locked up inside the largest maximum security prison in America, the notorious Louisiana State Penitentiary, also known as Angola.

Tension develops between two brothers who were arrested for the murders of four women. Also: an inmate discovers he has an incredible talent; two female inmates fight; and one of two friends suffers a tragedy.

The documentary series, which examines life at the Penitentiary of New Mexico, begins in Level 6, which houses the prison's worst offenders.

Recently uncovered pages from John Hinckley Jr.'s diary, which he began writing after he was arrested for trying to assassinate President Ronald Reagan, are revealed.

A rookie corrections officer at the Penitentiary of New Mexico deals with inmates in the lockup units of levels 5 and 6.

Detectives and forensic experts recount cold cases solved using familial DNA testing.

A 16-year-old girl who died in 1979 was last seen at a Dairy Queen in Las Vegas.

In 1981, Linda Slaten is sexually assaulted and murdered in her Florida apartment while her children sleep.

The three ways of leaving the Penitentiary of New Mexico---parole, death or escape---are explored. Included: rewarding inmates for good behavior by making them eligible for early release.

A stabbing is probed by the Investigative Services Unit.

A look at the reopened murder case of a young woman that police had considered to be closed.

Insights into the real story of the private royal, including a look at Diana's troubled marriage, her turbulent life in the royal family and the investigation into her death.

It started with a chance meeting at a nightclub and ended in murder. Those involved in the gruesome crime thought they had buried the secrets of the past, but a relentless team of investigators stopped at nothing to unearth the truth.

It takes 17 years to unravel the mystery surrounding the murders of three women in the middle of the Sonoran desert, and it's only solved when a fourth lady steps forward and tells the truth.

Real estate developer Gary Triano lived large. His murder was a bold statement. But not many people were talking. There were whispers of a mob connection, an angry investor or a mad ex and the mystery took nearly two decades to unravel.

Her life ended in mystery on a dead-end road: A mother of three who'd gone missing. For police, the investigation seemed to hit a dead-end, too. But a small-town story led to a very big break.

A young woman peers into her neighbor's yard and sees something for a few seconds. What she saw and what she did would set in motion a chain of events that would divide a family and a jury.

The stories of inmates whose sentences were extended due to infractions while incarcerated. Included: a car thief sentenced to 18 months who's now serving 16 years after committing aggravated battery on an officer on three separate occasions.

When a South Carolina coroner arrives at the scene of a car accident to find his friend deceased, he notices some unusual markings on her face and begins to think her death looks suspicious.

Rod Covlin calls 911 after his young daughter finds his estranged wife unconscious in the bathtub. Soon after her mysterious death, some loved ones would come to suspect that what happened was no accident.

The three ways of leaving the Penitentiary of New Mexico---parole, death or escape---are explored. Included: rewarding inmates for good behavior by making them eligible for early release.

A 22-year-old woman goes out for a jog in 1983 and never returned.

The identity of a woman who commited suicide in 1996 took decades before it was discovered.

The body of a little girl is found in the Arizona desert. Detectives are unable to identify her so the local community lays her to rest with the name "Little Miss Nobody".

A look at how inmates pass time in San Quentin State Prison. Included: an inmate who is creating a wall mural with brushes made from his hair and paint made from ink, shampoo and toothpaste; an inmate who cuts himself with his fingernails.

A look at one of the most important things in an inmate's life: visits from those on the outside. The meetings range from intimate visits with loved ones to business transactions to a way to smuggle drugs.

The discovery of a teenager's car abandoned on a New Jersey bridge turns into a homicide investigation. Police uncover a plot involving money, close friends and betrayal. Keith Morrison reports.

A Texas love triangle turns deadly, with a pink gun leading to an arrest. But new evidence forces investigators to reevaluate the case.

When a model and up-and-coming YouTube celebrity is found dead, police question her husband to see if he can provide any answers. Keith Morrison reports on what could have led to her death.

Detectives in Washington D.C. discover a puzzling connection between two women who disappeared two decades apart; an investigation reveals a sinister secret hidden along one of the busiest stretches of interstate in the country.

Police believed a pair of double homicides in Nebraska, five years apart, might be connected. Investigators working to solve the crimes feared the killer might strike again.

A visit to Alcatraz in San Francisco Bay to examine the 1962 escape of three inmates and recall the legends of "the Rock" such as Al Capone and the Birdman of Alcatraz. Also: the search for a California couple who are suspects in an attempted-murder case.

A clumsy bank robber; an underground drug route between Mexico and the US; alleged paranormal events in a Texas subdivision.

A purportedly haunted ranch in Texas; an abandoned car and its missing driver; claims of corruption at a California prison. Also: a doctor raises suspicions.

A Wyoming amnesiac; two jailbreaks; a double homicide in Oklahoma. Also: a cyanide-laced potion kills five on St Croix.