Jennifer appears to be at fault in a minor accident, but it was actually staged by the victim attempting insurance fraud. She and Jonathan are shocked when the victim dies due to complications, and then are sued by the grieving widow.

Jennifer's 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 valuable rare coin.

A friend of Jonathan 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.

The CIA asks Jonathan to pretend to be an agent to uncover an information leak.

The Harts escape to their mountain cabin, and get involved in rescuing a young friend who's being framed for murder by the local sheriff.

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.

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

The Harts become involved in international intrigue when they infiltrate a ballet company to clear a world renowned Soviet dancer of murder charges.

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.

A remote island, an exotic European chateau, and the mysterious disappearance of a publisher they were supposed to meet on the French Riviera are not what the Harts anticipated when planning their romantic getaway.

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.

After the owner of the beauty salon she's visiting hypnotizes her into stealing valuable baubles from her friends as well as the jewelry store, Jennifer is branded a jewel thief.

Jennifer's reunion with her father in Washington D.C. is laced with danger and surprise when she learns he was an intelligence officer in World War II and is now the target of an assassination conspiracy by an unhinged German man seeking revenge for his own father's death.

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

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.

Note: This episode aired 37 days after Robert Wagner's wife, Natalie Wood, drowned off Santa Catalina Island.

Max is kidnapped to force the Harts to throw a race in which their thoroughbred is running.

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. After Jonathan is rushed to the hospital, the unexplained attacks continue.

The Harts new musical investment, singer Lorene Tyler, is beginning an international tour. The singer's husband Jesse, a jewel thief, has a costume made for her that sparkles with diamonds disguised as rhinestones. After the outfit is loaned to Jennifer, Lorene's husband is desperate to retrieve it.

An eccentric art collector has become infatuated with Jennifer, and traps her and Jonathan in a glass cage.

A magician and his brother, who has had surgery to look just like Jonathan, plan to replace him and gain control of the Hart empire.

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. After another woman is killed, Jonathan wants the ads ended to protect Jennifer from any danger.

An air traffic controllers' strike forces Jennifer and Jonathan to take a train from Chicago to Los Angeles. When Jennifer discovers a dead body hidden in their closet, the Harts become involved in protecting a government witness from would be assassins.

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.

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