IA Sergeants Bivins and Petrelli investigate the fatal shooting of a prostitute by a veteran beat cop with a history of bending the rules. The cop is then convicted and sent to the same prison that holds some of the men he sent there.

While trying to box in an armed bandit who specializes in stealing cars and robbing attendants at parking lots, Detectives Hacker and Barnes are assigned a homicide case.

Detectives Gordy and Ballard go undercover in a white-supremacist gun club to bust a paranoid gun collector who specializes in illegal military munitions.

The head of an undercover narcotics division assigns a young policeman to infiltrate a high-school drug ring.

Everyone around Sgt. Pickett knows he drinks too much. But he doesn't admit it to himself, until the department suspends him and his wife leaves.

An undercover cop nearly loses his life trying to crack a big-time drug-selling operation.

Detectives Calabrese and Thorpe try to catch a sniper before he, or she, strikes again.

Arch Tatum is close to retirement and is teamed up with a head-strong young trainee who throws a curve for the long time vet.

Undercover cop Charlie Czonka tries to catch the big man behind a ring of prostitution, dope and extortion

A cop is consumed by guilt after innocent bystanders are killed in police shoot-outs.

Officer Ron Tice engages hostage-taker Richey Neptune in protracted negotiations, a task complicated by the fact that one of the five hostages is the Deputy Chief's daughter-in-law.

Veteran Sergeant Wilson can't escape the burdens of being mother hen to, among others, a green lieutenant, an alcoholic superior, and an officer who's becoming dangerously paranoid.

Detectives Stoddard and Bagney look for a man involved in an armed grocery store robbery after he shoots and maims Officer Phillips, a personal friend of Stoddard.

On his first day out of the academy, Officer David Singer fails to fire his weapon when a juvenile delinquent he is pursuing pulls a gun on him, with tragic consequences later.

While breaking in new partner Ron Cruz, narcotics Det. Frank Dolan is drawn by a drug-related murder into pursuing a drug kingpin from out-of-town, who may be attempting to muscle his way into the local market.

Detectives attempt to solve a double execution-style shooting, which one victim manages to survive.

Two officers from Robbery-Homicide attempt to track down a killer of homosexuals who mutilates the bodies of his victims.

Gene (Santos) has a falling out with his wife and moves into a temporary bachelor's apartment, which becomes a party hangout for his buddies and attracts a lot of unwanted attention from others.

Despite his best intentions, Dooly is a poor guy who can't seem to do anything right, at least not in his commanding officer's eyes.

Detectives Tony Calabrese and Bert Jameson try to hold onto a charming bank robber, which proves to be more difficult than actually catching him.

A police chief must overcome an assissination plot and political games in order to speak at a local meeting of police-haters.

A tough cop in charge of a special felony squad goes after the vicious son of a Mafia chief who is pulling a string of strong-arm robberies.

A special surveillance detail set up to catch criminals in the act finally nabs Slow Boy while he is robbing a supermarket. Complications arise when the robber takes a hostage before the police can detain him.

The question of whether or not policewomen should be assigned to ride in patrol cars is brought to the head in a gun battle with two killers.

A Mexican-American police sergeant who's been assigned to his original neighborhood leads the Juvenile Division in an attempt to head off a gang war.

IA Det. Sgt. Stiles investigates an indecent exposure charge against a veteran officer, resulting in the officer's dismissal. Months later, the exposure complainant confesses to a years-old murder, and subsequently raises doubt on his original testimony.

A daredevil officer is severely burned in a helicopter crash during a SWAT team training exercise, and he fights his injuries and police brass to return to his old life.

Detective Joe Barley enlists Holly, his "retired" snitch and recovering addict, to help him find the man who shot his partner.

Sgt. Kyles and Inv. McLiam try to break up the criminal activities of a local entrepreneur and philanthropist by bringing back his past as a violent revolutionary in Detroit and playing on his paranoia.

Detectives try to track down the two remaining robbers who participated in a tire store holdup that resulted in the deaths of an employee and one of the robbers. Their investigation leads them to a large illegal weapons operation.

Vice Detective Dave Tackleberry takes on a second job (to pay for his teenage daughter's figure skating development) at the same time he and his partner Det. Wurster try to bust a pimp specializing in underage girls.

Juvenile officers Craig and Prescott deal with runaways, delinquents, and Prescott's own troubled home life.

Det. John Darrin uses his experience in Chinatown to find the gang members who robbed a restaurant and killed one of the employees.

Det. Bert Jameson has a new partner, Lew Reeves, and Lew's vicious cold complicates their efforts to solve armed pharmacy robberies and to catch the chopper rider who holds up taverns.

Lew Randle, head of the Special Investigations Team, comes back after vacation and is immediately engulfed in the investigations of several armed robberies. He has to buck department politics to take down the violent trio responsible.

A beat cop has his newly established authority challenged when a wealthy girl he arrests avoids retribution in court.

An unauthodox cop accidentally kills a fellow officer and is put under investigation by Internal Affairs.

A cop on the take devises a plan to save himself from disgrace.

Two detectives become emotionally involved in a case when a friend is the victim of a robber/rapist/murderer.

As an officer tracks down a rapist, his marriage dissolves in favor of his badge.

Members of the Serbian community are being gunned down and the police have few leads. Sgt. Wilson decides to use officer Joe Basic, an ethnic Slav, in an undercover situation. Joe learns his father Andrea is a possible target.

Detectives investigate a series of murders of homeless men along the piers.

Sergeant King Sherman endangers the public and the SWAT team he commands while preparing for his Lieutenant exams. His wife convinces him he'll pass his orals if he shows confidence in his leadership skills by projecting total authority.

Det. John Darrin has to keep his primary witness to the restaurant shooting alive, while searching for his Chinese gang snitch, who has been snatched by a rival gang.

Sgt. Billy Humm starts feeling the pressure after he's involved in a few too many on-duty shootings, even though they were judged "good."

Ed Peebles has 30 years on the force, and after his longtime partner retires he loses his direction, both on the job and in his personal life.

Pairs of vice detectives spend a day trying to bust a violent pimp, a bookie, and a man who wants to hire a hit man to kill his wife.

Vince Della Maggiori has to investigate when a patrolman shoots a man in his hotel room, and the stories he is given don't add up.

Detectives close in on the multi-generational hill-country family responsible for a series of armed robberies, rapes, and murders.

Detectives Benson and Fisk set up a sting to catch a pair of murderous jewel thieves.