The Harts look forward to lunch with Jennifer's friend Marcie and her new spouse Adam Fowler, who vanishes and is soon found dead. Meanwhile, two men who followed him out of the restaurant trail who they think is his wife: Jennifer.

After witnessing a murder, Jonathan hits his head and loses his memory. As he tries to recover his memory, he starts to suspect he may have had a mistress -- and killed her.

Jennifer is kidnapped by a man who wants to get some of the money from an old crime by holding his ex-partner's wife, who happens to be a dead ringer for Jennifer.

Freeway is chosen to star in a new dog food ad campaign, but the creator has a secret ingredient and will kill to hide it.

Jennifer and Jonathan go undercover to identify a toy plan thief who has become a murderer.

An Egyptologist is killed just before the opening of a stagey exhibit, featuring the mummy of an ancient Egyptian prince who legend says is waiting for his princess to join him in death -- and she looks just like Jennifer.

Jonathan and Jennifer are in Hawaii for a croquet tournament when a tournament official is stabbed, and the Harts wind up in an international dilemma involving the KGB, MI-6, the CIA, and a fancy key that may unlock deadly secrets.

When Max's long-dead ex-wife suddenly reappears, kidnapping and a hot diamond necklace are not far behind.

Scalped stolen opera tickets land Jonathan in the middle of a plot to assassinate the DA who is fighting organized crime.

The Harts want to give their charity committee gourmet chocolate hearts as a thank-you, but when one turns out to have been part of a smuggling operation, can Jonathan and Jennifer figure out what is going on before someone tries the "special" chocolates from an unknown admirer?

Stanley's evening at a singles bar ends with a murder, and it's up to Jonathan and Jennifer to find out who set him up.

It's roundup time at the Harts' ranch, but Jonathan and Jennifer are distracted by dying animals, a rumored chemical spill, and a murder.

A used bullet hidden in their house by a new Hart employee leads to a cat-and-mouse evening with a murderer.

Max's bodybuilder protégé Vince is about to open a gym, but someone tries to steal Vince's famous barbells - twice. They leave Max injured the first time and a Scotland Yard inspector dead the second time, muttering the name Noel Teppman, an almost-mythical gold thief. Jonathan realizes Vince has been pumping not iron but gold and sets a trap for Teppman.

To catch a group of counterfeiters who murdered an investigator, Jennifer and Jonathan go on a cruise, she posing as a European countess and he working as a ship's steward.

After two attempts on Jonathan's life, he stages his own murder to see why someone is trying to get him out of the way. A stranger who once helped Jonathan out of a snowdrift turns up with a will supposedly leaving everything to him, and Jonathan's lawyer Owen starts putting the moves on Jennifer.

After a young model is killed at a fashion party, Jennifer and Jonathan agree to pose for a fashion shoot that leads to another murder. But Jennifer may have been the intended victim.

Did Jennifer's concussion cause her to hallucinate a patient being murdered?

When a playwright friend of the Harts' is killed and the Harts' copy of his last work is snatched, Jonathan is convinced something in the play motivated the murderer.

The Harts find a hidden room in their house, and someone else may be looking for it to find the missing fortune of the original owner of the house.