Max creates a rose hybrid he calls the Jennifer Hart Rose and enters it in a prestigious rose contest under Jennifer name. She becomes the target for murder when she is stalked by a psychotic leading judge.

While vacationing in Acapulco, the Harts borrowed car breaks down. They ask for help at the nearby estate and find themselves posing as domestics, attempting to prevent a politically motivated assassination.

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.

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.

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.

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

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.

The Harts new musical investment (singer Lorene)is beginning an International tour. The singer's husband Jesse, a jewel thief, has a costume made for her that sparkles with diamonds. The outfit is loaned to Jennifer and Lorene's husband is desperate to retrieve it.

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.

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.

Combining business with pleasure, the Harts scuba dive off the coast of Largos, testing an innovative underwater camera for the Navy. Early afternoon, as the Harts stroll along the beach, the body of a Navy SEAL working on the project washes on shore.

The Harts visit the gallery of a well-known stamp collector to see the Vermillion, the most valuable stamp in the world. The Harts inadvertantly gain possession of the stamp and their lives are in danger.

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.

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.

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 become involved in international intrigue when they infiltrate a ballet company to clear a world-renown Soviet danseur of murder charges.

While attempting to clear a friend of murder charges, the Harts become entangled in a disturbed woman's fantasies.

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.

Jonathan's new suit has been switched with another. To save time he decides to make the exchange himself rather than through the taylor. At the other man's hotel room, Jonathan and Jennifer discover a body.

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.

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.

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