Hardcastle and McCormick

As the final episode begins, Mark, who has secretly begun attending law school, is offered a paralegal job by Kenneth Malcolm, one of his professors. Meanwhile, Hardcastle, realizing that Mark's parole is up, decides to buy a car repair business, as a surprise gift for his friend. Upon hearing about Mark's job offer, Hardcastle, not wanting to stand in his friend's way, lies and tells his friend that he bought the company for himself. For his first assignment at law firm Malcolm, Hughes and Dewitt, Mark is asked to reclaim the possessions of Elsey, a resident of the Sunset Acres Retirement Home. Arriving at the home, Mark makes the acquaintance of Mimi LeGrand, a retired actress. Immediately liking Mimi, Mark is more than willing to comply when the former actress asks him to open a bank account for her. To Mark's surprise, he discovers that someone has already opened an account in Mimi's name. Concerned, Mark decides to go to Hardcastle for help. Before the two men are able to really learn anything in the case, they end up in jail as a result of a mistake made by Leroy, Hardcastle's assistant at the car company. While awaiting their release, Hardcastle decides to tell his friend the truth about why he bought the company. In response, Mark reveals that he has been going to law school in an attempt to follow in his friend's footsteps. Once released, Hardcastle and McCormick discover evidence that Malcolm and resident home manager Leonard Porter have been killing the residents and stealing their money. (They were able to move the money by secretly creating bank accounts in the seniors' names.) Armed with sufficient evidence, the crime fighting duo stop Malcolm and Porter. Despite the fall of his professor, Mark vows to continue attending law school. After selling the car business, Hardcastle makes a generous bet with Mark: If the ex-race car driver can beat him in a game of basketball, the judge will pay the law school bill. Due in the most part to Hardcastle's generosity, Mark wins the game.

In a change of pace episode, Mark begins to believe that Leprechauns are burying gold on the estate. Ignoring Mark's outrageous claims, Hardcastle concentrates on preparing the estate for an upcoming magazine contest. After Benny, Mark's mechanic, is assaulted by a group of men for information about a group of little people, Hardcastle admits that there may be some truth to Mark's Leprechaun story. That night, Mark and Hardcastle set a trap for the "Leprechauns". The trap works and Hardcastle captures the men who have been hanging around his estate. As the judge discovers, however, the little people are not Leprechauns but rather circus performers. Confronting the performers about why they are hiding out, Cluracan, the groups leader, explains that they are fleeing from communist agents that want to return them to their home country as well as Marvin, a circus promoter that had promised their services to Circus Maximus. As for the mysterious gold, Cluracan reveals that it is his family's money. The next day, communist agent Ivan and his men come to the estate disguised as employees of Ladies Garden Monthly, the magazine sponsoring the contest Hardcastle has entered. At the same time, Marvin and his men sneak onto the estate. With the circus performer's help, Hardcastle and McCormick manage to stop the agents as well as Marvin and his men. Later, Mark's continued suspicion that Cluracan's group are secretly Leprechauns seems to be confirmed when a rainbow leads to a mysteriously repaired Coyote.

After winning a Los Angeles area bar in a poker game, Sonny Daye, Mark's barely seen father, decides to run it with his son. With some financial help from the judge, Mark and his father prepare to reopen the bar as "McCormick's Bar and Grill". Meanwhile, Teddy Peters, the man who lost the bar to Sonny, is ordered to recover the bar by Doyle Madison, a reputed mobster. Despite an excessive cash offer from Teddy, Sonny, having given the bar to Mark, refuses to sell back the bar. Not willing to accept no for an answer, Teddy has his men rough up Sonny. After Teddy is killed in a drive-by shooting, Hardcastle realizes that there is more to the bar than meets the eye. Searching the bar, they discover that the mob has been burying bodies on the premises. Hoping to tie the bar back to Doyle, Hardcastle has Sonny arrange a meeting with the mobster. Taking the bait, Doyle makes a move to regain the bar. With the help of a bar full of police officers, Hardcastle and McCormick arrest Doyle and his men. Afterwards, the police impound the bar as evidence and Sonny, Hardcastle and McCormick are forced out of the restaurant business.

After 10 years, the judge is paid a visit by his brother Jerry. Suspicious, Hardcastle begins to wonder when his brother, a habitual gambler, will ask him for money. Although he decides not to tell his brother, Jerry is in fact in debt to a hood named Manny. Hoping to find a way to get out of debt, Jerry decides to bet on the outcome of a high profile murder trial. Thanks to Judge Sheila Mooney, one of his brother's friends, Jerry gets all the particulars about the case in which model Tori Van Zandt is on trial for killing Harland Eagle, her fiancee. After a private investigator named Horace Munson provides Tori with a convenient alibi, Jerry is confronted by Manny about his debt. Drawn into the Van Zandt case by his brother's involvement, Hardcastle begins to look into the case. Searching Munson's office, Hardcastle discovers that the private investigator, who has since been murdered, lied in court. Hoping to incriminate Tori, Hardcastle publicizes the fact that he has evidence in the case. As expected, Tori tries to kill the judge and the police gather the proof they need to convict her. At the same time, the police also arrest Mooney.

As the episode begins, wealthy businessman J.J. Norcross asks Hardcastle to run for mayor. Meanwhile, after city councilman Herb Austin goes head-to-head with Mann over a parks bill, a bomb explodes in the councilman's office and Austin is killed. Despite his campaign staffs assistance that he concentrate only on the election, the judge decides to look into Mann's murder. Deciding to help the judge, Mark sneaks into Mann's office and locates a map of possible park development sites. Checking out one of the marked locations, Hardcastle and McCormick discover an illegal toxic waste dump. Pursuing their investigation, Hardcastle and McCormick uncover proof that Mann had been bribed to change the site of the new park so as to cover up the illegal dumping. When Birdy Fletcher, the site's guard, asks to see him, Hardcastle realizes that he is probably being set up. As expected, Norcross, the mastermind behind the illegal operation tries to kill the judge. To Norcross' horror, a prepared Hardcastle and McCormick, turn the tables and close down the operation. In the process, Hardcastle discovers that Norcross only back his mayoral campaign so as to split the votes and give Mann the advantage. Later, although Hardcastle loses the election, he takes some comfort in the fact that Gilmore will most likely do a good job.

When the courts discover that a convicted felon named Randy Hopke had been defended by an incompetent lawyer, the original ruling is overturned and all charges are dropped. Hopke's release quickly prompts an argument between the judge and Mark. Hardcastle, having presided over the case, insists that, as originally determined, Hopke is guilty of assaulting his girlfriend Val Mickaelian. On the other hand, Mark, having known Hopke from when he was in prison, insists that the judge made a mistake. The two men, each hoping to prove they are right, set out to prove their respective positions. In the process of their investigations, both Hardcastle and McCormick realize that they are both wrong: While they learn that Hopke did not actually assault Val, they also discover that the released prisoner had planned the assault and was willing to serve a limited prison sentence to cover-up the fact that he had committed a murder during a diamond store heist. Theorizing that Val is probably working with Hopke, Hardcastle and McCormick follow her. As expected, she leads them to Hopke as well as the stolen merchandise. After an unusual "bus" chase, Hopke is captured and the case is finally resolved.

Innocently given a friendly kiss by a woman named Aleeya "Ali" Casir, Mark unwittingly falls into the middle of a major international incident: Assuming that Mark is the American his daughter has been living with, Sheik Abdullah Casir, Ali's father and the leader of an oil rich mid-eastern country, decides to take whatever steps are necessary to protect his son's honor. As a result, Casir orders his Americanized daughter to marry Mark. Meanwhile, Hassan and Rabin, Casir's sons, begin to set up a drug dealing operation. Hoping to maintain friendly relations with Casir, the State department approaches Mark and "requests" that he marry Ali. Although Hardcastle tries to explain to Casir that Biff Anderson, Ali's real boyfriend, would be more than willing to take Mark's place, Casir, having already made an official announcement, is unwilling to change his plans. Forced to follow through with the wedding, Hardcastle, having learned about Casir's drug dealing sons, decides to use the ceremony as an opportunity to expose Hassan and Rabin. Confronted with his sons' guilt, an angered Casir vows to spare himself grief by staying out of his children's lives. As such, the wedding is canceled. Later, Mark is amused to hear that Ali has left Biff to marry a 35 year old television executive.

Shortly after contacting her friend Mark for help, wrestler Kate Murphy dies during a match. Recognizing that Kate's death was no accident, Mark decides to follow-up on his friend's suspicions that wrestling promoter Marty Torrance is behind the disappearance of a number of young woman. Upon assembling a plan of action, Hardcastle asks friends Lucy and Denise to go undercover as wrestlers. Posing as a wrestling promoter, Hardcastle has Denise, using the alias of "White Lighting" challenge Nancy Mack, one of Marty's wrestlers. Impressed with Denise's ability, Marty agrees to a match and allows Hardcastle's team to train in his gym. Furthermore, Marty, seeing potential in Lucy, asks the "wrestler" out on the date. Although Lucy only goes on the date to get evidence against Marty, the promoter has his own plans. Before Lucy is able to contact the judge, however, Marty prepares to sell her to a white slavery ring. Worried about Lucy, Hardcastle confronts Nancy. Having suffered a falling out with Marty, Nancy comes clean and tells the judge about Marty's plans. Searching the promoter's house, Hardcastle and McCormick come across the location of Marty's meeting with the slavers. Thanks to Mark's driving expertise, Hardcastle arrives at the meeting site in time to rescue Lucy and stop the slavers.

Entering the hospital for a routine checkup, Hardcastle discovers that he is dying from an incurable disease. Not wanting to let his friend just fade away, Mark convinces Hardcastle to live his remaining days to the fullest, Taking Mark's advice to heart, the judge, using the money he inherited from his wife, buys a one million dollar boat. Hardcastle's boating career is short lived, however, for armed men steal the boat. Although Hardcastle is initially willing to let the police handle the crime, he changes his mind after discovering that the hospital made a mistake and he is not really dying. Searching the docks, Hardcastle and McCormick locate the boat. Instead of reclaiming his property, Hardcastle discovers that the boat really belongs to an influential Senator. Realizing that Barry Jackson, the man who illegally "sold" him the boat, is a con artist, Hardcastle contacts his bank to find out where his money is being transferred. With Lieutenant Harper's help, Hardcastle and McCormick stake out the bank and capture Jackson. In the process, Hardcastle recovers his money.

Although Hardcastle is initially pleased to be invited to a party on a private train, his emotion changes to anger when he discovers that he has been lured onto the train under false pretenses. His ire is further raised upon discovering that the train is not scheduled to stop for another day. One small consolation: Mark, accidentally trapped on board the train, is around to help him find out what is going on with the trip. The mystery takes a deadly turn when one of the passengers is murdered. Although the unknown murderer temporarily manages to get rid of Mark by throwing him off the train, the ex-race car driver, who is unable to identify his assailant, pools his resources and returns to the train down the track. Another murder prompts Hardcastle to set a trap for the killer. While Hardcastle pretends to be a victim, Mark purposely lets slip that the judge had obtained evidence against the killer. Taking the bait, passenger Carl Sharples tries to search Hardcastle's "body". Exposed as the killer, Carl reveals that he has been eliminating the people (strict teacher, ex-girlfriend, army commander, high school coach, that he selfishly believes "ruined" his life. With Mark's help, Hardcastle stops Carl before he can hurt anyone else.

After race car driver Kiki Cutter is injured during a race, Mark, knowing her from his own racing days, decides to pay her a visit. Fortunately for Kiki, Mark arrives just as someone tries to kill her. Although the killer manages to escape, Mark does manage to get his license plate number. Believing that the attempted assassination may be tied into Kiki's crash, Mark sneaks a look at the car. Confirming his suspicions, Mark finds evidence that Kiki's car was sabotaged. Meanwhile, Hardcastle traces the assassin's license plate to Hal Jenkins, an insurance broker. Some of the pieces of the puzzle are tied together when a recovering Kiki reveals that she has been secretly planning on divorcing Sammy "Sidewinder" O'Connell, her race driver husband. Once, Hardcastle has stopped Jake Thomas, the man who tried to kill Kiki, as well as arrested Jenkins, Mark, with some financial backing from the judge, decides to challenge O'Connell in a major car race. Thanks to his superior driving skills, Mark defeats O'Connell and settles a longstanding rivalry between them. Afterwards, O'Connell, who had selfishly acted out of fear of how the divorce would impact his career, is arrested for his part in the attempts on his wife's life.