Police officers are the target of a cop killer on the streets and are pestered by rats inside the precinct. Frank and Joyce are looking to buy a bigger house. Belker is undercover disguised as a bag lady.
Frank Furillo has killed his first man when stopping an armed robbery the night before. Officer Marty Nichols is gunned down by the cop killer, or so it seems. Joyce defends the Rutledge family against the abusive father, but the court's decision leads to even more tragedy.
Corrupt cop Marino is arrested and spills the beans on his entire precinct including revelations about Marty Nichols. The cop killer hits Coffey in the arm before calling to say he'll give himself up Freddie's diner.
Furillo breaks the news of Esterhaus's death. Bates is given serious consideration for Sergeant. Coffey's girlfriend is sexually assaulted. Belker goes undercover as a truck driver to try and catch thieves that are stealing poultry.
Goldblume takes a special interest in call-girl Whitney Barnes. Her arrest in a murder case turns up video tapes of her and several important men. Leo, upset about his cheating wife, is first taken hostage in a cell by the Rodriguez brothers and then accused of stealing police property. Belker is taking the death of Esterhous especially hard.
A nervous Lucy Bates takes over as roll call sergeant and finds she has to 'earn' the podium. Whitney Barnes' pimp turns himself in, only to be confronted by a professional hit man inside the Hill precinct. Frank honors Phil's last wishes by scattering his ashes on the Hill in an informal ceremony attended by most of the day shift.
Furillo gets in trouble with Mayor Ozzie Cleveland for criticizing 'Operation Stop 'N' Cop' on the news. Joyce faces a situation of life and death while visiting a client. Belker arrests his regular pickpocket one last time.
Hunter takes Fay out to lunch only after Frank and Henry's permission. Renko gets mixed up feeling when Daryl Ann reveals she is pregnant. Joyce is pressured to identify Timothy Mullens, causing his brother William to threaten her life in front of Frank.
Furillo has been relieved from command, leaving Calletano and Hunter to share command. Goldblume tells Belker, Washington and Garibaldi (replacing a sick LaRue) to tail William Mullins and make sure he stays away from Joyce. Jesus Martinez is assaulted by his pregnant girlfriend.
A former Blood gang member has been appointed to the Youth Corps Summer Job Program and becomes a target for other gangs, specifically the Diablos. Garibaldi strikes a deal with a man whose car he hit by accident. Belker is undercover trying to infiltrate a group of video poker vendors in 'Operation Straight Flush'. Joyce tells Frank she needs to have some time for herself.
Ray Calletano is a contestant on the game show 'Lucky Ducks'. Hunter is concerned about his ill horse Apollo. Coffey and Davis arrest a man who'll eat anything for money. The tuxedo fitting for Renko's wedding attendants turns into a brawl. Later his first meeting with his future in-laws doesn't run smoothly either.
Renko is having second thoughts on his wedding day. He and Bobby are assigned to take out a car equipped with a computer, and they lose the car. Coffey places a bet on a horse race because the officers haven't collected enough money for Renko's wedding present. Garabaldi persuades Goldblume to try a video dating service with him. The bookies busted by Belker high jack their prison bus and demand Belker be handed over to them in exchange for their hostages. This occurs when Ballantine is filling in for Hunter as leader of the EAT squad.
Furillo is furious when his separation from Joyce is mentioned in a newspaper article involving a death row client of hers, Celestine Gray. Stan Jablonski takes over roll call duties from Bates, who returns to patrol with Coffey. Fay takes up a permanent spot in the precinct working for the Victim's Aid pilot program.
Goldblume goes after the guy who raped his ex-wife, even though she refuses to press charges. A member of Hunter's SWAT team is put under scrutiny after shouting an obscenity while firing at a hostage taker. Calletano participates in an undercover operation at a hotel. Davenport performs a last ditch effort to save a former client who is scheduled to be executed.
When Lieutenant Hunter upsets clerk-typist Rhonda Kimmel, she barricades herself in the male toilet LaRue spends the night with Cathleen McConnell, the victim of a car-jacking, but during the night she receives news of the murder of her husband - LaRue wonders if he has been set up as an alibi. An illegal cable TV installer is arrested, and Davenport turns out to be one of his customers; she is unwittingly involved, but Furillo uses the situation to engineer an end to their separation. Rachel Goldblume's rapist is released on bail, murders his girlfriend, and is ...
News breaks during Roll Call that patrolman Swan has killed himself following Buttman's rowdy initiation party. The hooker that was involved also turns up dead and Washington leans on officer Garfield to spill the beans on what happened. Calletano, Hunter and Goldblume all have their eyes on a Government study grant to be handed out by Furillo. Renko and Hill find themselves followed by a TV reporter who soon joins Hill for a dinner date. LaRue is tempted to spend another night with Caroline, who became a widow on their first night together and this time, he faces a ...
Renko makes a fool of himself on the morning news but manages to turn things round in time for the evening edition. LaRue is accused of conspiring with Caroline Reynolds to kill her former lover. Washington threatens to quit after all the rookies are suspended in the wake of Buttman's arrest, including Officer Garfield who came forward with the truth. A Bengali restaurant showers the Hill with flyer's, but all the cops who go there for lunch end up inspecting the kitchen.
The search for Rev. Booker Simons' killer is complicated by interference by narcotics inspector Keenan and Faye's attempt to aid the widow. Jesus Martinez has changed his look and become a law student, who's first case is prostitute Lotta Gue. Hill & Renko find a dead man accompanied by a life sheep.
When murderer Floyd Green is released from prison, Furillo assigns Garibaldi & Mayo to keep him in their sights at all time. Belker has to fly to Las Vegas and pick up a prisoner. LaRue wouldn't mind a trip to Vegas himself and gets his chance when he and Washington bust the distribution of stolen airline tickets. Bates is concerned with the fate of a young shoplifter named Fabian.
An assassination attempt made on Mayor Cleveland leads to a investigation in police corruption. Belker, LaRue, Coffey, Hunter, Calletano, and Washington embark on a trip to Las Vegas which begins with Belker winning $5,000. Hill and Renko's judgment call puts a store owner's life in jeopardy.
When the check LaRue used to pay for the Las Vegas plane tickets bounces, their return trip gets canceled. The actor formerly known as the Cisco Kid causes havoc on the streets once more, this time dressed as an American Indian. Furillo takes in the conspirators against Mayor Cleveland despite the Hill being understaffed.
An older lady shoots a burglar and soon becomes apparent that it may have been a set up on her part rather than self defense. Hill & Renko put Paul "The Wall" Srignoli in a cell, only to have trouble getting the obese man out again. Posing as a bum, Belker is knocked out , beaten and robbed by actual street-dwellers.
A gang war between the Bloods and Shamrocks is brewing. Belker lets the end of his relationship with Tattaglia interfere with his undercover job at a beauty parlor. Garibaldi attempts to get young hooker Carla Walicki into rehab.