Simone and Sipowicz investigate a shooting that is related to the victim trying to leave a street gang. Meanwhile, Kirkendall and Russell investigate the death of a baby who appears to have been shaken to death by the baby-sitter. Medavoy and Martinez look into a murder at a garage where they have a suspect who looks guilty despite the fact he claims to have an alibi. That evening, Medavoy has dinner with Abby and her lover, Kathy. Also, Simone takes Russell out to a movie and proposes to her again, and this time she accepts.

An inebriated Vince Gotelli is arrested after "hijacking" a city bus and having it wrecked. Fancy meets with the bus driver's boss to work out an arrangement about their investigation and suggests that Gotelli take some medical treatment. But it takes a forced intervention by Martinez, Medavoy, and Russell to convince Gotelli to get medical and psychiatric help in which Gotelli decides to throw in his badge for good. Meanwhile, Simone's continuing help with the FBI makes his life miserable when the men from Internal Affairs investigate him for the government license plate number on Salvo's car that he ran and is frustrated when he cannot tell them, not even Sipowicz, about what he's doing. Elsewhere, Sipowicz and Simone investigate the beating and murder of a woman in her apartment and deal with the emotionally sensate superintendent of the building whom they think he knows more than he's telling them.

Medavoy launches his own investigation when Abby, and her girlfriend Kathy, are both shot by an intruder in their apartment in which Kathy dies and a grief-stricken Abby cannot bring herself to answer Medavoy's questions about her past and her former lover who may have been the assailant. Meanwhile, Simone, Sipowicz and Russell investigate a suspect after the charred body of a young woman is found in an abandoned vehicle. Also, Gina develops complications with her pregnancy and is taken off work for a few weeks.

Simone and Sipowicz try to conduct their investigation in the midst of racial turmoil in the station and the neighborhood when a young white teenager is murdered in a black neighborhood during a drugs-for-guns deal that went bad, and the victim's racist father comes to the station and begins quarreling with Lt. Fancy over his race and roll in the investigation. Meanwhile, Medavoy and Kirkendall investigate the strangulation and dismemberment of the mother of a young boy, who's discovered his mother's body in the refrigerator. Also, Russell decides to take some time off since she's feeling ill due to pregnancy morning sickness, only to suffer a miscarriage at the end.

Simone and Sipowicz work with Cohen to investigate the death of one of Cohen's witnesses and her son. Evidence points to the opposing attorney having some involvement with the arrangement of the homicide. Meanwhile, Russell and Kirkendall try to help a man locate his missing daughter. Medavoy and Martinez look into a corporation dealing with fake sports memorabilia, where Medavoy is taken in with the blond employees who reminds him of the departed Donna. Also, when Sipowicz thinks about his low sexual functions, his doctor prescribes the wonder drug Viagra. In the mist of all the cases, Simone and Russell decide to get married on their lunch break, but their cases get in the way of it all.

A gigolo is suspected of killing one of the tenants who lives in his apartment building. Sorenson's friend kidnaps a man who groped female passengers aboard a bus.

The team investigate a courier firm robbery where Mike Roberts works, which looks like an inside job. An old lady dies, her apartment is robbed, and her nasty sister makes an impression.

The squad attends a homicide with seven naked bodies. Jill's ex is arrested.

Andy and Danny reopen an unsolved murder when the body of a small child is found buried within a wall; Medavoy and Jones deal with the owner of a dog who has a bullet in his nose they need as evidence in their case.

Andy and Danny investigate the robbery of an elderly couple; Medavoy and Jones deal with a wealthy woman with a grudge against her former maid; Danny's informant, J.B., seems headed for disaster.

Fancy bawls out Diane and Danny about being in a relationship. A man traveling on the subway is killed. Denby is implicated in the courier scam.

A man loses his penis. Fancy makes Captain and the incoming Lieutenant is a ball-breaker. Andy is having second thoughts about Cynthia. A mob hit-man sings like a canary and implicates a celebrated Customs officer.

Sipowicz is hailed a hero after killing the man responsible for Sorenson's murder. While Lieutenant Rodriguez teams up with another precinct to investigate the robbery of his mother, the squad investigates the murder of two men affiliated with NYU.

The detectives investigate two separate murders of a college student and a Latina woman. Sipowicz goes after Mrs. Hornby's business manager. Haywood finally makes a decision about her pregnancy.

The detectives investigate two crimes: the murder of a back-alley cosmetic surgeon and a violent rape; Clark finally takes Laughlin on in the boxing ring.

A boy on a bicycle is murdered. Connie's sister posts bail for her husband.

When NYPD Auxiliary Police Officer Heather Peterson is murdered, the detectives find her diary that details the sexual habits of the police officers at the 15th precinct. These findings cause the detectives to suspect the officers of the 15th precinct had something to do with her death, and the investigation of the cops cause tension between the officers and the detectives.

Sipowicz and Clark investigate the death of a transvestite whom a friend insists was having a relationship with a married man; a surgeon's hand is badly cut during a robbery; and Rodriguez testifies in the Fraker trial.

Sipowicz searches for the truth when Hatcher is shot by a man who mistook him for a burglar; and a former pharmacist dies in a flophouse when someone fires a bullet into his room.

Sipowicz and Clark investigate the stabbing death of a coffee-shop owner who was attracted to young girls; Ortiz tries to keep her cousin out of trouble; and Medavoy and Jones link a murder to a paralyzed police officer and his family.