When J.J. Hafner is murdered, Julliet Hafner, his daughter and a friend of the guys, hires the detectives to find the killer. At J.J 'a funeral, the guys meet their first suspect: Michael Harris. Julliet then explains that Harris, her father's partner in the oil business, had been arguing recently with J.J. The guys get more evidence against Harris when they catch him sneaking around Julliet's apartment. Unfortunately, Harris is later found dead. A check on Harris's body written to Rick Osborne, the owner of a gambling ship, then leads the guys to the next phase of the investigation. Murray then performs some creative accounting on the guys' bank accounts, and the detectives obtain an invitation to one of Osborne's cruises. Once on board the boat, the guys learn that Harris had been a regular customer. The detectives then pretend to be cheating in order to get in to see Osborne. The guys thereby hear when one of Osborne's men calls his boss with information that J.J. had sent a package to a Murray Bozinsky before being killed. Fortunately, the guys are then able to escape from Osborne's boat. Afterwards, the guys "break" into the post office and get the package. Inside the package, they find a computer tape that reveals that Hafner had discovered a giant oil reserve. Realizing that Julliet is in danger, Cody goes to protect her. Unfortunately, Cody and Julliet are captured. Homing in on a transmitter that Murray had given Cody earlier, Nick and Murray fly (on the Mimi) to the rescue. Therefore, Cody and Julliet are soon rescued. Additionally, Osborne and Segura, the man who was trying to buy the tapes, are captured.

After Murray receives some money for writing a book on computers, a distrustful Quinlan assumes that the Boz's recent financial gains are the result of the guys having committed a number of robberies in the area. (Helping Quinlan's case is the fact that a copy of Murray's book was found at the scene of one of the crimes.) Meanwhile, Cody has his own problems in the form of an unwanted girlfriend named Francine. However, Cody's problem is temporarily put on hold when the detectives decide to clear Murray by catching the real thieves. The guys begin their investigation and soon learn that all of the houses were robbed while the owners were on vacation. Furthermore, they discover that all of the burglarized families had boarded their pets at the Camp Wellington kennel. Using Bucky, Francine's obnoxious dog, the guys then check their pet into the Camp. As expected, the guys soon receive a visit from the burglars. Thereby, they discover that a housewife named Annie and her sister Rainey are behind the crimes. The detectives also learn that the two sisters have been forced to commit the crimes by a mobster named Joey Dietz. (Annie was forced to borrow $20, 000 from Dietz after making a math mistake on her taxes.) Rainey and Annie then take the guys to Dietz's warehouse. Unfortunately, Dietz has already moved on. Dietz, having become suspicious of the two housewives, then kidnaps Rainey. Furthermore, the Riptide is soon burglarized and all of the guy's personal belongings are taken. Fortunately, a quick computer trace by Murray leads the guys to Dietz. Rainey is then rescued and the guys are able to recover their belongings. Later, Cody finally ends his relationship with Francine, albeit not in the way he expected, for it is Francine who breaks up with him (after learning her pet was used in the case).

Under false pretenses, Mark McPherson, an acquaintance of the guys from their army days, arranges a meeting with the detectives. McPherson then explains that he is on the run since he is writing an expose about his days as a CIA agent. As he can not go home, McPherson hires the guys to feed his parrot. Reluctantly, the guys accept. The guys go to McPherson's apartment where they meet Gloria Burghoff, a woman claiming to be McPherson's fiance. Meanwhile, McPherson rents a helicopter that crashes. Later, the guys are investigating the crash site when they are shot at by some men in a plane. Of course, the guys survive the attempt on their life and they then confront Gloria about some inconsistencies in her story. Gloria admits that she is not Mack's fiance but is actually an FBI stenographer. Furthermore, Gloria explains that she learned about McPherson when she was assigned to record a statement Mack was to make about mobster E.G. Shaw. The guys thereby realize that McPherson, who was Shaw's chauffeur and not a CIA agent, is fleeing from Shaw. Gloria, hoping her investigation of the case will help her get promoted to field agent status, then joins the guys as they revisit McPherson's apartment. A thorough search turns up the name of the newspaper that was going to publish the expose. The guys then visit the offices of the National Investigator where they find out that MacPherson was recently issued a check. The guys trace the check and find out that McPherson is still alive. Unfortunately, Shaw soon kidnaps MacPherson. In response, the guys contact Shaw and offer to trade the manuscript (which they do not have) for MacPherson. Fortunately, Shaw is captured and McPherson is rescued when the guys arrive for the trade. Later, although she does not become an agent, Gloria is promoted to Director of Interrogation Analysis.

After a blown armiture derails the guy's fishing vacation, they end up going to a nearby village for some assistance. However, the guys are in no way prepared for what happens when they stop by a nearby house. Not only does Ruth Davis, the house's quirky occupant, know the guys, she also knows that she is about to be arrested for murder. Believing Ruth to be somewhat eccentric, the guys disregard her concerns and proceed to Wally's service station to get supplies. Unfortunately, Wally and most of the town mistake Cody for a disliked town troublemaker named Jake. Cody's mistaken identity then involves the guys in a brawl in a diner. As a result, the detectives end up in jail. Strangely enough, as predicted, Ruth is also in prison having been arrested for the murder of her nephew Karl. After bailing themselves out of prison, the guys decide to help Ruth clear her name. First, the guys go to Ruth's house to get enough money to pay her bail. In the process of looking for the keys to the house, the guys come across pictures of someone digging as well as an undeveloped roll of film. Later, after Ruth is bailed out the guys learn some background about Karl: Seven years ago, Terry Miller, the homecoming queen, was kidnapped and murdered by a man named Tony Davenport. Although there was no proof, the police had also believed that Karl had been involved in the crime. Then, after stopping a fire that Ruth had predicted, the guys develop the film they found. With Ruth's help, they then learn that the film they found contains pictures of Terry's murder as well as pictures that prove that Tony Davenport has been in town recently. Thereby, the guys deduce that Karl must have been using the pictures to blackmail Tony and, in response, Tony must have killed Karl. The guys soon realize why Tony is back in town when they learn that the police never recovered the ransom money that had been paid to Terry 'a kidnapper. (One of the sets of pictures was of Tony trying to dig for the previously burned money.) Since Tony is still in town, the guys determine that the killer has not yet recovered the ransom money. Thereby, the guys go to the spot where Tony has been digging and plant a decoy briefcase. As expected, Tony digs up the case and the guys are lead to the killer's hideout. Once there, the guys discover that Tony has been masquerading as one of Ruth's friends. Unfortunately, in the meantime, Tony manages to take Ruth hostage. Although they are slightly delayed by some townspeople seeking "Jake", the guys are still able to catch up with Tony and rescue Ruth. Later, the townspeople finally accept the fact that Cody is not Jake. However, Jake then shows up in town and pretends to be Cody in order to pick up the reward that the guys had earned for capturing Tony.

After Tony Guirilini, the son of famed oceanographer Angelo Guirilini, is shot while on a dive, the Riptide guys decide to investigate. (Angelo is a good friend of Murray's sister Melba.) The guys soon realize that someone is interfering with Angelo's latest expedition when they catch some men lurking on the Arrivederci Baby, the Guirilini boat. Unfortunately, the prowlers manage to escape. Later, Cody and Giovanna, Angelo's daughter, dive in the spot where Tony was shot. However, their drive proves almost as eventful as Tony's when sharks arrive on the scene and they are forced to hide inside an underwater cage. Then, the two barely escape with their lives after an underwater submarine cuts the line that was supporting the cage. Afterwards, Cody and Giovanna share what they discovered underwater: All the fish near the dive site had died; apparently due to chemicals that had been dumpedd in the area. Nick and Cody trace the submarine and learn that it had been rented by employees of Vectrox, a company owned by a man named Harry Silverman. Since Silverman has been financing his expedition, Angelo assumes that the Vectrox employees are operating without their employer's knowledge. Therefore, Angelo tells Silverman what they have discovered. Meanwhile, a suspicious Nick and Cody decide to search Silverman's office. Their suspicions prove correct as Silverman soon kidnaps Murray, Angelo, and Giovanna to cover his tracks. Fortunately, having found proof that Vectrox and Silverman are involved in illegally dumping hazardous waste, Nick and Cody are soon flying to the rescue on the Mimi. Thereby, Silverman is captured and Murray and the Guirilinis are rescued. As the episode ends, a recovered Tony is released from the hospital.

Dragged to a harmonizing seminar by Murray, the detectives only end up arguing with each other after a sarcastic comment from Nick turns into a fight with a man named Ed Kramden. Afterwards, having heard the guys introduce themselves as detectives, fellow seminar attendee Sara Rafferty hires the Riptide Detective Agency to find out if her husband is having an affair. The guys accept the case and are soon trailing Chris Rafferty to a warehouse. However, the guys are surprised when they hear a gunshot and find the dead body of an unidentified man. The next day, the guys update Sara as well as give her a transmitter to hide on Chris' clothing. Later, the detectives learn from Quinlan that the warehouse body is missing and the case has been closed. Regardless, the guys continue with the investigation. Listening to the bug, they soon hear Chris (who is upset that someone was killed) speaking to a woman named Carla. Based on what they hear on the bug, the guys stake out the Santiago restaurant. Unfortunately, the guys are captured by federal agents. After being questioned, the guys piece everything together and realize (based partially on what questions they were asked) that Chris has been trying to sell the top secret Aries Project to a man named Su Yim. Escaping from custody when they are transferred, the guys head back to Santiago. A gunfight ensues, but the timely arrival of Quinlan helps the guys to capture the crooks and to recover the Aries project. Then, in order to get the federal agents off their backs, the guys manage to convince Quinlan to explain that they were all part of a police sting. (Quinlan accepts in order to take credit for the arrest.) Later, the guys, having argued ever since the unsuccessful harmonizing seminar, are all prepared to go their separate ways. Fortunately, a visit from Sara (whereby she admires their teamwork) reminds the guys of their friendship and they decide not to split up.