A man who works for a diamond retailer hires a seemingly incompetent lawyer and private detective to help get his kidnapped wife back. Barnaby and J.R. get involved after they botch the first ransom attempt and the discover there's more to this kidnapping than meets the eye.
Barnaby asks a woman who has just been paroled for information on the man she was involved with so he can recover money he stole. She refuses, so J.R. goes undercover to get the info and discovers her life is in danger by this same man..
After a distraught and depressed woman attempts suicide, Barnaby Jones is compelled to re-investigate a case in which he may have helped wrongly convict her ex-husband of kidnapping a little boy four years earlier.
Barnaby continues to re-investigate an old kidnapping case in which he firmly believes the wrong man has been put into prison for the crime. But as the investigation deepens, and the murders pile up, Barnaby knows he is close to the truth.
Betty gets more than she bargained for when she helps a couple find their deranged son. After finding him she quickly discovers that they're even more deranged than he is-and that they'll kill anyone who gets in their way, including her.
J.R. tries to protect a beautiful young woman from a dangerous stalker and his two cronies, but they get trapped in a deadly situation with them. Barnaby gets suspicious that they are in trouble comes to their aid.
Barnaby and J.R. investigate a string of yacht disappearances in the waters off the coast of California and Mexico. Eyewitness reports say they were taken down by a mysterious whirlpool, but Barnaby suspects a hijacking operation is really behind the mystery.
Barnaby is one step ahead of three syndicate hit men in tracking down a witness in the remote mountains in a national forest when one of them fires a shot at him, grazing him in the forehead. The force of the blow knocks Barnaby temporarily unconscious, and when he wakes up he can't see. While hoping J.R. will rescue them both, Barnaby must rely on his wits to try to outwit the gunmen.
While taking a couple of days vacation to help out a friend, Betty encounters a serial rapist who prays upon women who frequent a local bar- only to learn that a different man has already been sent to prison for earlier similar assaults.
J.R. investigates the disappearance of a real estate agent at a resort lodge run by two sisters and their aunt.. The murders pile up as he begins to realize that he's in the midst of a nest of scorpions with these women.
Barnaby and J.R. get involved in a kidnapping for ransom that goes bad and a former associate gets killed during the drop off -or so it appears. Barnaby has a hunch that it was an inside job, then quickly gets wise to the whole scheme.
While Barnaby and J.R. are tied up working on another case, Betty takes a part in a stage production as a singer and dancer to find out who's terrorizing it's cast members. But when things turn deadly Barnaby and J.R. come running.
Betty investigates an academy for girls where a series of accidents have injured instructors and students alike. What she finds is a vicious group of girls who dominate the school through fear and intimidation tactics.