After extending her hospitality to a young author claiming to be a distant cousin, Jennifer experiences a series of near fatal accidents.

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.

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

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.

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.

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.

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.

An employee delivers some papers to Jonathan, along with evidence of a murder. She hides the clue in Freeway's toy and the Harts are held hostage by the murderer.

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.

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

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.

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.