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.

""Mysteries of Alien Beings"" reports on four men who say they were abducted by aliens while on a fishing trip in Maine, and includes research by psychiatrist John Mack. Also: a physicist's claim that he worked on a captured extraterrestrial spacecraft at a top-secret U.S. Air Force testing center. (Repeat)

• Wanted: Jerry Strickland & Missy Munday • Final Appeal: Michael Martin • Unexplained Death: Kurt McFall • Lost Loves: Undelivered WWII Letters

Segments: the murder of a North Carolina woman who was shot in her car while returning home from a holiday party; fortunetelling scam artists working in the Midwest. (Repeat)

Reports include the 1986 disappearance of a Morro Bay, Cal., man, whose wife was murdered in 1982. Also: repeat segments on the hunt for a fugitive health-care worker; an update on a German Air Force officer's search for his biological father.

Reports on the disappearance of a young Ohio woman more than eight years ago; the search for a Florida woman wanted for questioning in a 2 million theft from her ailing husband; the manhunt for an alleged armed robber and killer on the FBI's Most Wanted list.

Reports on the murders of two Washington teens; nocturnal sightings in the skies above Texas; the vanishing of a Pennsylvania security guard and a fortune in platinum. (Repeat)

A 45-year-old kidnapping case examines a Chicago man's search for his brother, who was abducted from their parents' home. Also: a profile of a Missouri man who preyed on women's hearts and pocketbooks.

New reports on a rash of Northern California pizza-restaurant robberies; the reunion of a millionaire and his daughter; and a fugitive's arrest in Colorado for kidnapping and murder. Repeat segments include U.S. intelligence reports suggesting there were survivors of a spy plane shot down over Laos in 1973; and the search for a fugitive con artist.

Segments include a $7 million hidden treasure, reportedly buried in New York in 1933 by gangster Dutch Schultz; a couple who in 1993 became victims of a gunman in a Marietta, GA., hotel room; a 1988 child abduction; the Texas murder of a woman and her 5-year-old.

Repeat segments on a New Jersey woman whose psychic powers are tested; and 19th century miner credited with hiding 21 million in gold and silver. Also: an update on the capture of an Iowan wanted for embezzlement.

Segments on the reunion of lost members of an Oklahoma family; the search for an Arizona couple who posed as doctors reportedly to defraud unsuspecting patients. (Repeat)

Segments on a ""Southern belle"" who, according to this report, bilked investors out of millions in a pyramid scheme; a Colorado Vietnam veteran's search for a fellow soldier.

From November: Reports on the shooting of a former San Diego cop, who resigned from the force after testifying against fellow cops; the capture of a scam artist who preyed upon a Florida nudist camp. (Repeat)

Beginning a fourth season: U.S. military officers discuss a 1980 sighting of an unidentified flying craft near a U.S. air base in England. Also: the murders of two Texas teens reportedly involved with a cult; a Nashville, Tenn., woman's discovery about her parentage.

Reports on suspicions surrounding the disappearance of an Oregon police officer's son; an Indiana man's search for a friend and father figure of 20 years ago; the hunt for a man who reportedly murdered his estranged wife and her co-worker in front of witnesses; the recovery of a Maryland amnesia victim.

Reports: a con game using state lottery tickets that took in millions of dollars in New York state alone; the search for a homeless person who may stand to inherit $100,000; a former runaway's search for three of her nine estranged siblings.

Repeat reports on the grisly murder of a Virginia woman; an amnesiac found unconscious in the Las Vegas desert; the controversy surrounding the Shroud of Turin; and the search for the husband of a murdered Rochester, N.Y., woman.

A segment on a Nazi death-camp survivor's 44-year search for the American soldier who gave him a miniature American flag; a report on the Maryland murder of a U.S. Army intelligence officer, who may have been killed by Soviet agents; the search in Arizona for a woman wanted for questioning in the death of her boyfriend; an update on the capture of a fugitive on the FBI's Most Wanted list.

Reports on a Seattle man suspected in the killing of his wife; the Texas search for two teens charged with killing four persons; a Georgia woman's quest to locate the person who protected her from child abuse.

A report (postponed from last week) on a clever mother-daughter financial scheme; evidence that some claim substantiates the existence of the elusive Big Foot; the hunt for a Florida man wanted in connection with hit-and-run homicides.

IRS and FBI efforts to stop a medical-investment scam operated by a team of con artists; the murders of two Swedish women vacationers, discovered in 1983 by deer hunters near Santa Barbara; a 17-year-old disappearance case, stumbled upon by a rock climber.

Reports include a viewer tip leading to the arrest of a burglary suspect in Santa Fe, N.M.; the search for more substantial clues in the assassination of a Chicago attorney; and a man's search for a friend.

A new report on the search for two robbers who target stores in the Pacific Northwest. Also: repeat segment on a surgeon's murder; a viewer tip leading to a suspect in the hit-and-run death of a Los Angeles DJ; and a Polish family's search for their son.

A report on aphrodisiacs, including one man's claim that chocolates improved his sex life; and theories involving a reported secret government ray gun. Also: a family finds new evidence in a son's 1977 death.