Jonathan and Jennifer set sail, incognito, on a gambling ship in an attempt to crack a counterfeiting ring.

Jonathan and Jennifer enact a troubled marriage in very public places in an attempt to flush out the culprit who is trying to cause a rift between them.

The Harts return home and find their house ransacked. During the clean-up, they discover a hidden hallway and vault. The Harts and their friend Ida are sealed in the vault when the crooks return to claim the municipal bonds hidden in the vault.

An Air Traffic Controllers' strike forces Jennifer and Jonathan to take a train from Chicago to Los Angeles. When Jennifer discovers a body in their compartment, the Harts become involved in protecting a government witness from would-be assassins.

Jennifer, flying a kite in the park, falls and hits her head. She's hospitalized with a slight concussion. While in hospital, she witnesses the murder of another patient and tries to convince Jonathan of the strange crime is being covered up.

A psychotic man pours a blinding chemical into the Harts pool. Seconds after Jonathan dives in for his morning swim, he surfaces, screaming in pain.

Jennifer's death scene in an amatuer production could become the real thing when the director realizes she can identify him as a murderer of a young playwright.

A Jonathan Hart look-alike, with the help of his magician brother, plots Jonathan's murder intending to take over the Hart empire.

Jonathan witnesses a murder. In his rush to approach the scene of the crime, he is hit by someone on a mo-ped. The blow to his head causes temporary amnesia and the killer must get rid of Jonathan before his memory returns.

At the opera, Jonathan is mistaken for a hitman and is given an envelope containing $100,000 for the job. When the messenger is murdered, Jonathan poses as the hitman in an attempt to save the victims life.

The Harts' unscrupulous lawyer hires an assassin to eliminate Jonathan with plans to court and marry Jennifer and thus gain control of the sizeable estate.

A diamond ring given to Jennifer by Jonathan for their fifth anniversary enables their escape from a glass-walled room where they are being held captive.

Jennifer's reunion with her father is laced with danger and surprise when she learns he is a retired government agent and the target of an assassination.

The Harts face a $2 million wrongful death suit when a fender bender results in a driver's death. The Harts suspect insurance fraud.

JJHart, the Hart's filly looks like a winner. However, two men with a great deal riding on the upcoming horserace can't afford to have their horse beat.

On a restful trip to Maui, the Harts become involved in a murder when Jennifer hears the wife of Jonathan's business associate plotting to murder her husband.

A remote Island, an exotic European chateau, and a mysterious disappearance of an associate are not what the Harts anticipated when planning their romantic getaway.

The Harts want the solitude of their mountain cabin for a weekend. Instead they end up trying to rescue their caretaker from a murder frame by the local sheriff.

A friend of Jonathan's dies leaving his widow and son with a valuable assortment of baseball cards. Before the Harts can sell the collection for the family, it is stolen.

Chief accountant of Hart Industries, Stanley Friesen, is set up to take a murder wrap after an evening on the town. In an attempt to clear him, the Harts retrace his steps and discover a gambling ring using the Nightlife as a cover.

Jennifer's article on the world of high fashion leads to Jonathan and Jennifer modeling for a famous photograper while trying to determine who is murdering beautiful models.

An ad campaign for a costly fake fur using high society ladies as models, including Jennifer, turns deadly when one of the women is murdered. Jonathan wants the ads pulled when a second victim is killed.

Jennifer has become a jewel thief. The owner of the salon she's visiting has hynotized her into stealing valuable baubles from her friends as well as the jewelery store.

Jonathan's vineyard partner discovers that Hart-Cabri is being sold as the more expensive Chateau St. Claire. When Cabri is murdered, the Harts investigate the fraud and murder.

Jennifer purchase of a flower from a blind woman leads to an attempted kidnapping when the change she receives is not a quarter but a very rare coin.