A Car-jacking turns into a drug investigation involving a pop star; A child endangerment case reveals a horrifying discovery about a missing baby; Rodriguez's wife is found dead of a overdose after speedballing; and Ortiz sets up a romanrtic surprise for Clark.
Sipowitz is marked for death after knocking a hooker down who belongs to a high-level pimp. And Clarke is connected to a murdered hooker when his name is found in her "black book".
Clark is informed that heis a suspect in the prostitute's murder and is under investigation by IAD while McDowell and Ortiz are witnesses to a letter bomb that may have contained anthrax.
Clark and Sipowitz investigate a murder wherer the victim was shot in the head and genitals. McDowell lends aid to her abused and pregnant sister and tries to get her brother-in-law to leave.
Sipowitz and Clark look into a kidnapping of a little girl when her father leaves her alone in a park, leading them to a child porn ring and a sickening discovery about the girl. McDowell has Sipowitz work her sister's abusive husband over to scare him off after he beats her again.
A teenager is murdered for a bicycle leading the squad to a pair of criminals and McDowell's sister bails out her husband and he severely beats her, eventually dying from her injuries after going into premature labor.
McDowell must take repsonsibility for his late sisters baby and when Maya Anderson's partner is killed, her account differs from a witness account and makes the investigation more difficult.
A pair of prostitutes are found murdered in the same fashion, bound naked in trash bags. Sipowitz tries to convince Connie not to shut her out of his and Theo's lives and that they could help each other with their kids. Lt. Rodriguez confronts his estranged wife as she makes an attempt at reconciliation.
A young, female, auxilary cop is murdered and the ensuing investigation reveals that she had been sleeping with cops, putting many of them at the top of the suspect list.
A social worker with a reputation for taking kids away from bad parents is found murdered. Sipowicz and Clark are rebuffed by their fellow officers when they are suspected of giving names of fellow cops to internal affairs. Rodriguez finds a new wrinkle in his relationship with his ex when he discovers she may have stolen a car for drug money. And the widow of a recently deceased cop wants to spread half his ashes in the precinct.
Amidst Sipowicz's mixed feelings about moving in with McDowell and Clark trying to deal with issues about his dad being flipped by internal affairs, they investigate a bi-polar boy who witnessed his mother's death at the hands of his father.
Clark is placed under arrest for possessing heroin, a woman is found murdered with a drill, and Sipowicz's kid starts to act up in reaction to moving in with McDowell.
Sipowicz investigates Clark's drug arrest and looks for evidence supporting his suspicions that Laughlin set him up for the fall. Ortiz and McDowell investigate a string of rapes.
Shannon gives in and reveals the truth about laughlin setting up Clark for a fall, leading to Laughlin's arrest and Clar's release. A social worker who works among gangbangers is found murdered, and a prominent gay man is found shot to death.
Sipowicz and McDowell's relationship begins to strain. A transvestite prostitute is murdered and the prime suspect is a conservative married man who claims he was robbed. Also, a Pakistani man may have murdered his daughter to prevent embarassment over her relationship with an American boy.
After not being to contact his father for a while, Clark finds him dead from suicide. Sipowicz, trying to save whats left of the Clark's dignity makes it look like an accident. The Deetctives investigate a shooting that turns out to be a hit ordered by the victims husband and her lover. They set her up to get the confession and take them to jail. Theo walks in on Connie naked.
After Jones accidentally shoots a 13-year-old boy, the department is accused of police brutality. Meanwhile, a man who beats women is found dead.
The detectives investigate the murder of a small-time band promoter. Also, mail-order brides are falling victim to violence and Haywood worries over the release of a felon.
Connie is surprised when, during the hearing for custody of her niece, the baby's grandparents show up asking for custody. Meanwhile, Sipowicz investigates a fraud ring and McDowell and Ortiz investigate the stalking of a waitress.
Sipowicz and McDowell investigate Colahan's parents to keep them from getting custody of the baby. Also, Haywood is attacked.
Sipowicz asks Detective Diane Russell for help with the custody suit. Also, the bludgeoning death of a young woman is investigated.
Sipowicz and McDowell make plans to get married, but a rule against married cops working together causes problems. Meanwhile, Clark and Sipowicz investigate a series of murders that seem to be racially motivated and Captain Fraker has a vendetta against Rodriguez and Sipowicz that brings about terrible consequences.