Jonathan and Jennifer are robbed during a birthday party for Max and go undercover for Jingle-Grams.

A woman claims to be Jennifer's half-sister and her father believes she could be the daughter of his nurse during the war. Jonathan, however, is suspicious and sets out to find the truth.

While in Greece, Jonathan and Jennifer race to save their lives and the future of Hart Industries when a European business magnate seeks to destroy them during a cross-country car rally.

Jonathan teams with tennis great Martina Navratilove in a game of doubles aimed at exposing a deceitful tennis pro and the stockbroker who is blackmailing him.

Jennifer fears for Jonathan's life when ruthless jewel thieves take him hostage during a robbery while he's on a business trip in Paris.

A traditional fox hunt is marred by murder during the Harts visit to England -- and sends them off on the trail of a killer.

The Harts and Max fear for their lives when the debt-ridden brother of Max's penpal believes Max is rich and comes to steal some of his fortune.

Jonathan purchases their Honeymoom bed, but the wrong bed is delivered. In their search for the ""real"" bed, the Harts become entangled in an international art smuggling scheme through San Francisco and the Napa Valley.

Jonathan thunders into the glamour and excitement of polo, unaware that he and Jennifer have become targets for murder in a smuggling scheme using a prized polo mallet to transport a $1-million gem.

Jonathan and Jennifer remember how they first met and fell in love in the midst of murder and international intrigue in the picturesque locale of London.

The Harts and Max are held at gunpoint when a murderer realizes that Jonathan has incriminating evidence linking him to the death of a champion skier.

While vacationing on the exotic island of Rhodes, Jennifer and Jonathan become ensnared in a scheme for the smuggling of ancient Greek artifacts and are nearly entombed in the process.

Jennifer and Jonathan help Max seach for his lady love, who has fallen victim to a pair of money-hungry crooks.

While waiting for Jonathan to finish a meeting in a London casino, Jennifer is used as an unwitting pawn to transport money to the United States by a Baron.

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.

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.

When a bridegroom disappears abruptly and leaves his wife, who is an acquaintance of Jennifer's, to face a couple of thugs by herself, the Harts step in to help her.

A deranged woman who works for Hart Industries has an obsession for Jonathan. She sees Jennifer as a threat to her fantasies of love and finds it essential to eliminate her.

The Harts have a deadly encounter when they enter the mysterious world of psychic phenomena. A Hart Industies employee with amazing powers of ESP, a twin sister, and a wealthy grandfather, becomes the target of a deranged killer.

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 become involved in the world of espionage when Jonathan purchases an antique car for Jennifer. A mysterious jet-setting couple will stop at nothing to acquire the classic auto.

A drug trafficing scheme is ruined when Freeway's kennel is switched with one containing cocaine.

Jonathan and Jennifer pose as a professor and a student in a dangerous scheme to expose the person responsible for the drug framing of Max's nephew, a college basketball star.

Jennifer races to save Jonathan, who is serving as radar operator aboard a fighter jet rigged by a saboteur to explode during its top secret test mission.

Jonathan buys a perfume factory following the murder of the owner by his chemist wife and her lover.

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.

A young boy shows up at the Harts gate in the middle of the night claiming to be Jonathan Hart, Jr. The child proves to be the unwitting pawn in his biological father's criminal plot.

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 and Jennifer are stalked by dangerous industrial spies after they are entrusted with a dog that happens to be carrying a valuable biogenetic formula.

Jennifer is stalked by a psychotic stage manager who lurks in the wings as the Harts don top hats and tails to perform in a charity benefit in the Big Apple.

Jennifer takes refuge in a convent after witnessing a gangland slaying. Jonathan must race to save her when the killer discovers her hiding place.

Jonathan and Jennifer stumble into a plan to steal ancient treasures from a South American archaeological dig.

Max is duped into thinking that he has won a million dollars and leaves the Harts to thieves who take over the house.

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

Jonathan buys Max a lethal cigar and after accusing him of being predictible Max disappears, leaving the Harts to find him before it's too late.

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.

Jonathan and Jennifer travel to the Bahamas to meet with a recluse and discover that his assistant has replaced him with an imposter to gain control of his fortune.

Jonathan joins Jennifer at her prep school reunion and is drugged by a former admirer who wants Jennifer for himself.

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.

The Harts are invited to a unique, off-beat party -- a treasure hunt at a haunted house. When another guest is murdered, the Harts race against time to find the murderer before someone else becomes victim.

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.

Normally finicky, Freeway is quite fond of a new dog food and ends up in a dog food commercial. When the Harts have a party, some of Freeway's new food is mistakenly ingested by some guests who then behave as if drugged. Jennifer and Jonathan are in danger when they attempt to find out its secret formula.

The Harts are asked to ransom two scientist employed by Hart Industries when they are kidnapped in South America. When Jonathan, Jennifer, and Max, they wind up mounting a mid-night raid against the wealthy and powerful kidnapper.

Jennifer orders three chocolate valentines. Someone makes a mistake and delivers the wrong heart for the Harts. One contains a smuggled object that the thieves want at any cost.

Intrigue in Vail lead Jonathan and Jennifer into the midst of severe bizarre murder plot, including an electrifying scheme against them.

Vince, a friend of Max's, arrives in USA to open a chain of health clubs. International criminals smuggle a solid gold barbell into the country with Vince's entourage.

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

While visiting a wildlife reserve, Jonathan and Jennifer are hunted as prey by a competitor of Hart Industries.

Freeway runs away with a gun used to murder a wealthy neighbor. The Harts get involved in capturing the killer and intercepting a multi-million dollar jewelery shipment.

During an Opening Night party for a new Egytian exhibit at the museum, the man who discovered the tomb is murdered. The Harts become involved in the investigation when Jennifer sees a mummy at their home

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.

Max's ex-wife, presumed dead for over 10 years, arrives in Los Angeles. Her friend is murdered, so she calls Max for help. When two thugs try to grab her at the park, she is injured and Max is kidnapped. Demands are made for a necklace about which the Harts know nothing.

Jennifer has her protrait done as a gift to Jonathan for their anniversary. When the young artist is murder, the Harts mingle in the high-society art world where Jennifer becomes the target of a shady art speculator.

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 take a luxurious cruise on a Hart Industries liner to investigate a series of jewel thefts. They find themselves at the mercy of the jewel thieves' rival burglars.

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.

Jonathan and Jennifer are asked to buy a bankrupt ghost town.

At a croquet game in Hawaii, a player is stabbed and dies at Jonathan's feet, muttering something about a key. Two of the spectators suddenly become interested in the Harts.

A dying man gives Jonathan and Jennifer an ancient Buddha statue. The Harts are then thrown into intrigue and danger when they are pursued by Chinese henchmen and a diabolic giant.

The Harts uncover a scheme designed to blackmail wealthy patrons of a beauty salon.

The Harts are caught up in a tangled scheme when a wealthy playboy attempts to take over the family fortune using his brother's wife as his unknowing pawn.

Jonathan and Jennifer try to help a king save his culture's golden statue after it is stolen by the king's assistants.

Jennifer wins a walk-on role on a soap opera which leads to a writing job that nearly gets her killed by the leading man.

A psychotic woman is obsessed with Jonathan and is killing anyone who gets her way.

Art forgers are replacing masterpiece paintings with fakes and the Harts take action to trap them.