Romano is working undercover as a male stripper at a night-club where the owner is a suspect in a cocaine smuggling ring, when he witnesses his contact being shot dead. The dead girl had an incriminating photo of a key drug importer, but it is stolen by a small time criminal who wants to use it to blackmail his way into the drug operation. Before her death, the girl had sent the negative of the incriminating photo to her sister, a deaf mute; but she is attacked by the same man who stole the photograph from her sister, and has the negative snatched from her. Hooker and Romano investigate the tug-of-war over the incriminating negative as they try and identify the heads of the drug operation and put them out of business.

The pursuit and capture of a criminal reunites Hooker with Officer Karen Remy, whom have previously been romantically involved with each other, but soon after, Hooker is informed that Karen is dead after being shot in her car. With the murder having signs of being a professional hit, Hooker becomes determined to find the person responsible, and his prime suspect is Karen's Police partner. His disobeying orders by continuing to probe the killing sees Hooker suspended, but that's not enough for him to give up the hunt, but is there more to the case than he knows?

While in pursuit of a pair of burglars who brutally attack anyone who interrupts their robberies, Corrigan pulls unconscious Stacy from their patrol car when it crashes, moments before it explodes. With the hunt on for the violent thieves, Stacy and Corrigan's ordeal brings them much closer together than ever before, something that begins to affect their working relationship, and sees Hooker injured due to their distracted states.

Arriving at the scene of the brutal murder of a college girl, Hooker recognises the method of murder as used by a serial killer dubbed ""The Night Ripper"", who was behind a spree of six grisly sex murders four years previously and was never caught. With the psychotic killer terrorising the city once more, Hooker is under pressure to uncover his identity and get him off the streets.

When Hooker and the team assist in a large drugs bust, the main dealer escapes, but a videotape is seized that incriminates Hooker for seemingly taking bribes to keep prostitutes out of jail. Stripped of his badge and gun as he awaits being charged with corruption, he travels to Las Vegas and meets up with the prostitute accused of bribing him, in a bid to clear his name and get to the bottom of the drug operation by nailing the mastermind crime lord at it's centre... Meanwhile, Corrigan asks Romano to use his trainee lawyer skills to help a pregnant woman caught up at the scene of the bust who is an illegal immigrant.

Hooker and Romano are involved in a new neighborhood peace programme designed to reduce tension in an area where two Hispanic gangs are close to declaring all out-war on each other. But the whole programme and peace on the streets is jeopardised when the president of one of the gangs is gunned down in a drive-by shooting. Although the assailants are identified to be wearing the dress code of the victim's rival gang, Hooker suspects that someone else is fuelling the feud to benefit from the sale of fire-arms sold to both sides of the conflict, and must work fast to find the culprits before all-out war erupts between the two gangs.

Dani Starr is an attractive Hollywood Detective who lives alone, dresses snazzily, and always gets the job done. While en route to Hollywood to deliver a captured jewel thief, Hooker and Corrigan are ambushed by the thief's men, who free their leader. Hooker teams up with Dani Starr to find the sprung thief, who is the prime suspect in the murder of a porn film producer. As they search for leads, they find that there is a Mob connection; Hooker learns that Dani's husband was previously murdered by the Mob, and she is determined to find those responsible.

A friendly LCPD baseball game is interupted by a shooting, when a passing man, out for a walk with his daughter, is shot in an attempted execution. The wounded man is none other than Russ Paterno, a retired mobster who is now an informant and has been helping the F.B.I. With the valuable information Paterno continues provide them, the Feds are eager to keep him alive, and ask Hooker make sure no harm comes to him. Behind the shooting, and several similar executions, is a militant, right-wing paramilitary group called P.F.A.D.W. - ""People For A Decent World"", who's maniacal leader is determined to wipe out any and every individual he sees as responsible for bringing the world down.

When a female attorney is murdered by a shotgun-wielding killer, the third woman attorney to be killed in similar such fashion, Hooker, Stacy and Corrigan search out the killer - who is actually a man who's become embittered after his girlfriend was deemed mentally unstable and dropped from attorney school.

Pursuing a gang of robbers, Stacy receives a mild concussion in a shoot-out, and after being discharged from hospital, decides to take a break to go and visit her sister. But driving through a fierce thunderstorm and still in a slightly dazed state, she is involved in a minor road accident which leaves her with amnesia, and is taken in by a passing motorist who claims to be a local doctor. Meanwhile, Hooker and Corrigan become concerned at Stacy's sudden disappearance, and investigate a break out from a mental hospital where two dangerous patients have escaped - and unbeknown to them, one of the escapees is the man posing as the doctor who has taken in Stacy.

Hooker's children come to visit their father, but the vacation is interrupted after Corrigan and another Officer unwittingly disrupt an armed race-track heist, which leaves Corrigan's fellow Officer dead. The robbers were under the pretence of being ambulance attendants, and Hooker has reason to believe that the robbery was an inside job; but the case means that his time with his cherished kids is limited.

Corrigan and Stacy stop a car for speeding, only to have the trio inside open fire on them with automatic weapons, badly wounding Corrigan. Hooker and Romano are first on the scene, and the trio, who comprise of a woman who is a convicted murdered and two men who have broken her out of prison, take sanctuary in a nearby church, with Stacy and the seriously injured Corrigan as hostages. With the church surrounded with SWAT Officers, Hooker must try and negotiate not only with the gun-happy thugs, who are demanding a safe passage to Mexico, but also reason with the church's priest, also a hostage, who has beliefs that he is determined to stick to, not matter what the circumstances.

An attractive woman named Teri, whom Hooker meets when giving a speeding ticket, finds that her friend has been robbed and raped, and herself is attacked when she unwittingly stumbles onto the scene, until Hooker comes to the rescue. She aids him as they try to identify the violent gang behind the attacks, and in their together, they quickly fall in love, but things take a nasty turn when the gang track Teri down and badly attack and rape her. The result of the attack takes its toll on her and Hooker's relationship, and causes Corrigan, Stacy and Romano to become concerned that Hooker's fierce pursuit of the gang is being clouded by personal feelings and the want for revenge.

A parking attendant's suspicion leads to the discovery of a woman's body in the trunk of a car, sending Hooker and the team on the trail of a psychotic killer who is on a cross-country murder spree. Meanwhile, the deranged killer lures a young woman into his clutches and takes her hostage, leaving behind her husband and sick baby. Hooker persuades the Detective in charge of the case to let him place a trap to try and catch the killer and get the woman back safely, but it places Stacy in great danger.

When Hooker, Stacy and Corrigan aid in the stake-out of a money counterfeiting operation, Corrigan accidentally shoots dead an informant in the crossfire, while the head of the ring escapes. The shooting leaves a remorseful Corrigan questioning his choice of career, something that deepens even more when he is later forced to shoot a man involved with the counterfeiting ring who takes a hostage. The two fatal shootings leave the veteran Officer seriously considering leaving the force and taking a job offered to him by the woman he may choose to spend the rest of his life with. As the hunt for the counterfeiters continues, Hooker and Stacy try to convince him otherwise.

The State Department asks Hooker's help in tracking down a man whom he served alongside in Vietnam - a disillusioned, mentally unstable trained executioner – who is planning to assassinate the head of a visiting Russian trade delegation.

After an off-duty Officer is shot dead in a grocery store, Hooker – an old friend of the family's – promises the dead man's wife and son to find the culprit. A case in which the deceased Officer's partner sent a criminal to prison on a false testimony may be the key to the killing; but all the time, the killer has his next target in his sights... Meanwhile, Hooker looks into the recent murder of a local prostitute, only to discover that the two cases are linked.

After an armed box office heist where the robbers escape on motorcycles leaves Hooker and Romano's patrol car destroyed by a bomb and a young man dead, Hooker and the team are on the look out for an infamous criminal named Willie Donovan, whom Corrigan has a grudge against after the collapse of a previous investigation. But a shoot-out with Donovan which leaves Donovan dead, a gun from the robbery room of Corrigan's previous Police department, and an exaggerated report of Police brutality from a informant all mount up to Corrigan being assigned to desk duty while he is investigated. Hooker intends to prove Corrigan's innocence, while putting a stop to the series of robberies.

Unbeknown to Romano, his law school teacher is living with ex-convict Jack Lewis, the ring-leader behind a string of armed robberies. Already upset about the recent death of a close friend, Stacy is almost killed when she and Corrigan respond to armed robbery on a pawn shop, when the thug she apprehends disarms her. As Hooker and the team search for Lewis, who specialises in training criminals to disarm cops, the incident leaves Stacy with shaken confidence and an internal investigation over the lapse which nearly cost her her life.

After the third in a series of murders on attractive young blonde women, Stacy goes undercover to work as a salesgirl at a shopping mall store where each of the girls had worked, to act as bait to try and lure out the killer. With Stacy wired up, Hooker, Corrigan and Romano keep tabs on her until the killer makes himself apparent, but Hooker is concerned when the gun used in the murders suggests the killer to be a cop, and all indications point to the store's security officer being the culprit. But the operation puts Stacy in a dangerous position.

Hooker, Corrigan and Stacy are working undercover on a pimp sting when they respond to an armed robbery alert at a nearby bank, and the ensuing shootout as the robbers escape sees an Officer fatally wounded and dying in Stacy's arms. The hunt is on for the murderous gang, who are already putting their next bank robbery plan into motion, but Stacy's performance begins to suffer as she is over-come by fear that she will be the gang's next victim.

After a drug bust that nails a drug-importing ring, that leaves a corrupt Officer involved with the ring dead, Hooker gives Stacy the honour of booking the seized heroin in at the precinct. Soon after, 'Mac' Mackenzie, an old fiancé suddenly re-appears on the scene and rekindles his relationship with her. But when the seized heroin is switched for sugar, meaning the Officers have nothing to hold the captured drug dealers on, Stacy is forced to hand in her badge and her gun until a hearing over the incident. Hooker begins to suspect that Mackenzie's re-appearance is rather too coincidental and that he is somehow involved with the drug ring; But with Stacy and Mac planning to get married, can he prove his fears in time?

Following the bludgeoning to death of a nurse, Hooker and co. investigate the case, the latest in a series of similar murders - a string of killings that Hooker investigated years before that has recently began again, in which the attacker sends a rose to the intended victim prior to the attack. With the aid of a disabled veteran detective and a top psychiatrist, Hooker and the team investigate and find evidence that the murderer, always dressed as an old-fashioned nurse, may actually be a man. But the pattern of the killings suggests that they have less than 48 hours to catch the killer before he / she strikes again.

Hooker is delivering a captured criminal to the Federal court building when he meets Senator Grayle, an old friend; when a bomb intended kill the Senator explode. With Hooker having saved the Senator's life, himself, Stacy and Corrigan at the Senator's request travel to Honolulu, Hawaii, to work with the local Police department there and protect the Senator and his wife from the ruthless gangsters out to assassinate him. But in his time protecting the Senator, Hooker finds that he does not approve with many of his old friend's ways and methods; and it's a tangled web leading to finding just who is behind the threats.

Corrigan and Stacy respond to a seemingly trivial call about an illegally parked vehicle, only to stumble onto an armed robbery of a check-cashing outlet. As Corrigan calls for back-up, Stacy intervenes in the robbery to stop a man from being shot, only to taken hostage by the trio of armed thieves. With Stacy held prisoner by the robbers, the head of the trio rapidly develops an ""obsession"" for her, much to the aggravation of his girl-friend, who is also one of the theives. As Hooker and Corrigan search for Stacy and the thieves, they risk taking on the might of City Hall when it becomes apparent that the father of one of the trio is involved in the Mayor's re-election campaign and is prepared to pull strings to keep the whole case quiet. Meanwhile, the trio's leader's obsession with Stacy continues to grow – and it is the only thing that is keeping her from being killed.

Hooker becomes involved in an F.B.I. drug bust operation, a ""sting"" which leaves an undercover Detective critical in hospital, and the drug ring's middle man shot dead by the front man, who walks away with the $100,000 sting money. With the ploy following the same pattern as several previous identical ""rip-offs"", Hooker and a Federal agent join forces to put a halt to the big-time drug runner's scam, but their methods in putting the racket out of business clash.

When Hooker and Stacy take Hooker's children for a trip to the beach, a minor fire distracts Hooker long enough for Chrissie to disappear. She has been kidnapped by bitter ex-cop Marty Latham, who was struck from the force and ultimately sentenced to prison after becoming involved with The Mob. Latham will only return Chrissie if Hooker finds the whereabouts of his family, who cut contact with him and disappeared while he was serving time.

During a stake-out, Hooker is forced to shoot a hired hit-man, unable to learn who he was hired to kill. Soon after, an armed robbery at an airport cargo depot leaves security guard Bill Kennedy, an ex-Officer, fatally shot. Stacy had previously met the kindly Bill through his blind son Steve, leaving herself, Hooker and Corrigan determined to find whoever pulled the trigger. But their investigations suggest that the hit-man and Bill's killing were linked, and that the whole thing seems to be connected to the Mob, and Steve is next on the hit list.

Hooker's investigation into a series of gristly murders by a pair of religious crazies is accompanied by Sergeant Leigh Stockwell, a close, old friend, whom is somewhat his protégé. But Stacy becomes suspicious that Leigh is using cocaine, an addiction which not only jeopardises the case and Leigh's job, but also Hooker's life.

Hooker is on a date with Lisa Jericho, an infamous ""muck-raking"" reporter, when the restaurant they're in comes under gun-fire. A man whom Lisa had previously done an article on is killed in the shooting, but Hooker begins to theorise that Lisa was in fact the intended target when later her life once again is endangered. Unbeknown to them, the crooked head of a construction company that the reporter is investigating, is determined to see that she isn't around to print an up-coming article revealing his corruption.

When Hooker and Romano spot a cocaine deal taking place and intervene, they are surprised to find that the supplier is a family man with no prior convictions. With the help of an old flame of Hooker's, a reformed gambling addict, they uncover a crooked gambling club owner's scheme that involves having members run up huge debts on rigged games, and then forcing them to make drug deliveries to help pay off the money they owe.

An ex-prostitute is trying to convince a young girl new on the game to give it up, when the pair unwittingly stumble onto a mobster's back-street deal, who with his henchman, goes after the girls to make sure they don't talk and leaves one of the girls dead. As Hooker and Romano investigate, they find themselves uncovering a web of corruption involving city officials.

Hooker, Romano, Stacy and Corrigan are staking out a small-time drug dealer when they find that a major drug supplier is involved – who is being staked out in a Federal investigation. Hooker is ordered to keep well away from anything to do with the Fed operation and any of the smaller dealers which may be involved with the drug ring, something which proves to be difficult and results in Hooker being suspended. But an old flame, who is a Fed agent, is undercover posing as the girlfriend of head of the ring, and Hooker, fearing for her safety, is determined to put the ring out of operation himself - even if it costs him his job.

After Corrigan drops Detective O'Brien's niece Jennifer off at a jewellery store to buy a gift for her uncle's 25th anniversary in the force, the store is hit by a pair of armed robbers, and in the robbery Jennifer is gunned down. With the only lead being the hi-tech gun used by one of the thieves, Corrigan feels responsible for Jennifer's death, and the investigation is hampered by a television news reporter eager for a story. Meanwhile, one of the murderous robbers gets a taste for the fame that the shooting brings him, and plans to make a play for the determined reporter.

Hooker, Romano, Stacy and Corrigan are involved in an undercover operation to nail a large cocaine dealing ring, when a highly respected fellow officer is killed, execution-style, by the ring, who are on to him. Tracking down one of the thugs involved, Romano is badly injured by a gun-shot wound, before Hooker captures the goon, who gives the lead of a crooked bail-bondsman who is involved with the dealing. Against the wishes of a DEA, Hooker and Corrigan go undercover as drug dealers, with Stacy posing as one of their carriers, to infiltrate the dangerous ring via the bail-bondsman and catch them in the act.

As Hooker and Romano examine the scene where a trio made an attempt to hold up an armoured bank van, Hooker finds a pigeon leg band dropped by one of the thieves. A pigeon breeding friend traces the band to its owner's address, where they meet the orphaned young sister of one of the men who is mixed up with the thieves. As they try and track down the robbers, Hooker forms a bond with the girl, and is determined to see that she isn't sent back to juvenile hall.

The latest victim of a serial murderer known as the ""Surfside Killer"" turns out to be a police officer. Stacy, a close friend of the murdered girl, fits the description of each of the killer's victims - young blonde females, and volenteers herself to work undercover to try and draw out the murderer. But Hooker does not have faith in the way the operation has been organised, and vows to watch over and protect Stacy himself.

Hooker and Romano are just finishing working on a case with Lt. Paul McGuire, a close friend and colleague of Hooker's, when they respond to a reported rape - in which the victim turns out to be none other than McGuire's own daughter. The girl is certain that she knows the attacker and can identify him, but the attacker, a lawyer, uses legal loopholes to get off without charge. As Hooker tries to nail the attacker ""by the book"", McGuire becomes infuriated at the lack of action taken and takes matters into his own hands, endangering not only his job, but Hooker's case that will bring the attacker to justice in the proper way.

Investigating the killing of a fashion model, who had also been working as a high-class prostitute, Stacy's contact, another model, is too found murdered in similar circumstances. Stacy befriends the murdered girl's room-mate, and goes undercover as a model at the company that the girls belonged to, to try and root out the killer, who is using sale of the girls to ensure a large order of costumes. But Stacy's handling of the case causes some friction between Corrigan and herself.

Responding to the alert of an armed super-market robbery, Romano and another Officer are wounded when one of the robbers opens fire at them. Romano blames a female Officer on the scene, who he believes to be guilty of cowardice in stopping the shooting, but with contradicting accounts of just what happened in the incident, Hooker angers Romano and several Officers when he announces he is to act as defence for the Officer in the upcoming trial. The move jeopardises both Hooker and Romano's partnership and their friendship, and the fact that the Officer had previously been brought up on a similar charge does not help her case; but was she actually the one to blame on this occasion?

When a man attacks and rapes a young female jogger, Hooker and Romano find themselves on the trail of a serial rapist who has left behind only one clue: a size 13 shoe-print.

While Hooker is investigating a violent supermarket robbery, his father, himself a retired police officer, arrives unexpectedly. Hooker is surprised at sudden arrival, and his father, who is in somewhat shaky health, ends up helping track down the supermarket robbery gang – but the one last case has a deadly outcome for the senior Hooker.

After a security guard is shot down when trying to stop a diamond vault robbery, the investigating detective is determined to prove that the guard had taken a bribe from the robbers and wants to nail him for aiding the thieves. The guard is an old friend of Hooker's who knows that his friend wouldn't have been involved. As he and Romano investigate to find out the true circumstances it seems as if the detective is willing to go to any lengths, including blackmail, to see that he is covered in glory for his busts and quickly fly through the ranks.

While on a stake-out to capture a strangler who is killing homeless women, Corrigan receives a blow to the head while struggling with a suspect, leaving him with a concussion which triggers sudden, unexpected bouts of enraged behaviour. But the suspect Corrigan took on isn't in fact the strangler, and with the real killer still on the loose, Hooker and the team must track him down before he strikes again. Corrigan's refusal to acknowledge his condition doesn't exactly help matters.

While out for a jog on the beach, Hooker finds the body of a dead young woman in the surf. When the coroner's report is unable to identify the girl, and indications are that she was murdered, Hooker becomes personally concerned in finding the person responsible. An attractive painter and a small book of phone numbers found with the girl are the only leads in the hunt for the killer, but as Hooker investigates the killing, attempts are made on his own life, as the murderer tries to keep him away from unravelling the events behind the girl's death.

Hooker and Romano get caught up in the dispute between an independent trucker and the ruthless wholesaler who is sabotaging the trucker's operations. Against the wishes of his superiors, Hooker insists that he intervene in the situation before the truckers tire against the lack of action taken against the saboteurs, and become vigilantes to deal with things themselves. A new female Police commissioner who doesn't agree with Hooker's methods does not exactly help matters.

The hunt for a serial arsonist that is torching condemned buildings intensifies when a Private Investigator, who is an ex-cop and an old friend of Hooker's, is murdered. Certain that the man was on the verge of finding out who is behind the attacks, Hooker and Romano work with his daughter, who is also a PI, to bring the arsonist to justice.

Responding to a shooting at a cock-fight in China Town, Hooker thinks he catches a glimpse of a face from the past in the crowd. As he investigates the illegal dealing of automatic weapons in the area, the face turns out to be the daughter of a woman who he was once in love with, but had to cut off their relationship after her husband, presumed dead, had turned up alive. But now, the man is involved with the gun dealing, and sees that he has an old score to settle with Hooker.

When an undercover armed robbery stake-out is bungled, leaving a cop wounded in hospital, Hooker becomes concerned that a veteran cop's heavy drinking was the cause of the stake-out's failure. As he hunts for the armed robbers who are targeting night-clubs, Hooker becomes more and more worried that his fellow officer is an alcoholic, and is not only endangering police operations, but himself and everyone around him.

A diamond thief and his partner trick a young boy and abduct him, in an act to spite and distress the boy's mother, who is the man's former wife. Hooker follows the trail to Mexico, where an eccentric local detective helps him to track down the thief and the missing boy.

Following an execution-style murder connected to a drug racket, Hooker joins forces with ex-partner and personal friend Jim Cody to solve the killing and put the drug ring out of business. But as they investigate the case, it becomes apparent that Cody's own daughter is a heroin addict and involved with key members of the drug ring.

Romano, celebrating his new Porsche sports car, takes Hooker out for a night at a dance club, but the car is stolen, hitting a gypsy king as it speeds away. The injured man and his 10-year-old niece have been tracking the thieves trying to recover stolen automobile parts, but they refuse to give any information to the Police. The next day, the man is murdered, but the niece once again refuses to talk. Hooker reluctantly releases the girl into the custody of her older sister, hoping that she might open up to her about the killing, but the young gypsy girl is determined to avenge her uncle's death.

A 17-year-old girl is killed in a struggle during the filming of a porn movie, and when her dumped body is found, it turns out to be the niece of Hooker's colleague, Detective Max Brodsky. Hooker takes charge of the case, with Stacy going undercover as a potential porn star to get inside the production company; but Brodsky's obsession with nailing the killers himself jeopardises the whole investigation.

On Stacy's first week of field training, Hooker assigns her to be partnered with tough veteran officer Jim Corrigan, who has low opinion of female cops after his former parter was killed while partnered with one. Meanwhile, Hooker has a personal concern in catching the culprits of a series of violent mini-mart robberies in a factory district, when his ex-wife Fran is badly wounded in a hold-up and is in danger of being left blind as a result.