Seasons & episodes

The series' third season opens with a report on sightings of a bright orange fireball that crashed in Pennsylvania and was reportedly removed under military supervision; a woman's first meeting with her biological father; an arsonist's home movies.

Segments: a murder attempt on a former Florida mayor; an Arkansas family's search for a long-lost brother; a five-plane Navy patrol's 1945 disappearance over the Bermuda Triangle; an antidrug activist's shooting.

Reports on the search for a Bakersfield, Cal., physician; the FBI hunt for a robbery gang suspected in armored-car holdups in Minnesota and Baltimore; and the disappearance of a Spokane electrician

Segments on the 1976 murder of a New Yorker who may have known too much about an organized-crime ring; a case involving the infilitration of Government computers and private phone lines.

Reports on the search for Nazi treasures buried near the Austrian-Swiss border; the disappearance of a movie producer's adult son in Beverly Hills; the search for an escaped convict; the disappearance of a boat and crew headed for Haiti.

Reports on a series of child-molestation cases; a Tennessee family's search for a missing sibling; a series of bizarre murders in a small town in New Hampshire.

Segments include the story of a South Carolina couple whose home withstood the destruction of 1989's Hurricane Hugo after their reported encounter with a ghost; the disappearance of a La Jolla, Cal., financial analyst in the El Paso desert.

New evidence in the 1937 disappearance of Amelia Earhart; the search for the murderer of a Woodstock, Ill., family; a climatologist who accurately predicted seven earthquakes in the past decade.

Repeat segments from the past three seasons include reports on Nazi war criminal Rudolf Hess; the murder of race-car driver Mickey Thompson and his wife Trudy; and supposed findings of intelligent life on Mars. Unexplained Death: Mickey Thompson (UPDATE)

The FBI probe into the 1965 murder of a black lawman in Louisiana; an update on a series of 1988 arsons; a policeman's nine-year search for his two sons; the hunt for a ""cowboy"" bank robber in Arizona and Washington.

Segments: the fatal shooting of a Massachusetts youth; the disappearance of a 4-year-old on a picnic in Montana; the murder of a truck driver at an Oklahoma rest stop; a reunion of two childhood friends.

The possible wrongful conviction of a Missouri man with the murder of a 79-year-old woman, which later resulted in a confession from a Kansas inmate.

Reports on the search for an assailant in the shooting of a North Carolina secretary; the murder of a pizza deliveryman and the subsequent finding three years later of the gun in a pawnshop; the unclaimed fortune of a deceased British socialite.

The search for a ""casanova killer"" who wooed then murdered women; a Florida man's search for his brother, who reportedly died in Vietnam but who may still be alive.

Unanswered questions involving the death of a 28-year-old nurse found in a North Carolina pond; a woman's search for her father, reportedly involved with the CIA.

Reports: a five-plane Navy patrol's 1945 disappearance over the Bermuda Triangle; a murder attempt on a former Florida mayor; the search for suspects in the shooting of an anti-drug activist. (Repeat)

A new segment probes the reopening of a murder case following anonymous phone calls to Florida police insisting the victim is still alive. Also: repeat reports on the experiences of three sets of identical twins; a policeman's hunt for his partner's killer.

Reports on the 1989 death of a Spokane teen; the FBI probe into the murders of a Bethesda, Md., Government worker's wife, three sons and mother; the apprehension in Albuquerque of two Federal fugitives.

Reports on the search for a man whose wife and two stepdaughters were murdered in Las Vegas in October; the FBI search for a bank robber who twice escaped from prison.

A report on the FBI hunt for a coldhearted con man wanted for bilking women. Also: a repeat segment on sightings of a bright orange fireball that crashed near Kecksburg, Pa., in 1965.

Reports on the FBI search for a four-time prison escapee charged with bank fraud; the murder of a Maryland teenager; and the discovery on a South Pacific atoll of a possible artifact from Amelia Earhart's missing plane.

Reports on the connection between voodoo rituals and five deaths on St. Croix; a Hungarian man's four-year search for his sister in America; and a Texas UFO sighting. Also: viewer tips (postponed from last week) leading to the arrest of a man on kidnapping charges.

Segments: evidence said to refute historical theories on the deaths of Old West outlaws Butch Cassidy and the Sundance Kid; the death of a pediatric nurse who had been harassed and terrorized for seven years; a woman's search for her siblings.

A segment on crime fighter Eliot Ness's effort to solve the case of a 1930s Cleveland killer known as the Butcher of Kingsbury Run. Also: the 1989 murder of an Oregon prison director; a woman's 7-years search for her two sons; and viewer tips.