Jessie has to deal with the murder of her husband. When guns are stolen from the property room she realizes that the two crimes may be linked to it.

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Stanton shoots a young suspect in self-defense and is stalked by the dead girl's friend. Meanwhile Jessie finds an abandoned baby in the car and becomes attached to him.

Lynn and Amy attempt to keep order in a neighborhood that is torn by feuding Serbians and Croatians. Meanwhile Molly must deal with her grandfather's mental breakdown.

Molly is talked into becoming a phone sex operator to catch a serial killer. Meanwhile Jessie interrogates an informer who might know something about the councilman who was shot dead in a car in the park.

Molly and her training officer have to transport a insane murder suspect and Lynn must handle an old con-man. Meanwhile Jessie decides to go on a talk show.

Lynn is stabbed with a drug addict's used needle while attempting to arrest him. Meanwhile Jessie investigates a man who claims he fired the shot that killed John F. Kennedy.

Molly's dream day off turns into a nightmare when she becomes a hostage in a coffee shop. Amy and Lynn are accused of using excess violence in arresting a traffic violator.

Jessie gives a talk at her old high school where a student is shot. This event exposes a secret club in the school. Meanwhile back at the station a mad bomber makes life more difficult for the officers.

Molly is in a quandary when she accidentally learns that a fellow officer was involved with a murder victim. Jessie and Dan investigate a possible child abuse case.

Lynn reaches out to a teenage girl who witnessed a murder but reluctant to testify. Richie and Molly try to stop an extortionist. Stiles goes after a gangbanger.

Richie is missing and Molly is frantic. Jessie is assigned to work with the FBI. When she becomes close to agent Jack, Dan gets jealous.

Molly and Lynn have to put their vacation on hold when they are assigned to protect a hostile socialite witness.

Detective Springer is partnered with his former training officer during a drug investigation. Lynn and Amy are assigned to protect a rapist who has served his time and has just be released from prison.

Molly discovers that her new boyfriend is a gambler whose debts are mounting and could possibly be connected to a recent murder.

Buddy and Dan are abducted by a group of desperate robbers and taken to an abandoned warehouse unknown to their fellow officers.

The investigation into the beating death of a family man uncovers a connection between the mob and the dead man's brother. Lynn has problems mourning Buddy's death while Amy is promoted into his old position.

While stopping a fight between two gangs, Lynn discovers that her cousin's son is a gang member. The parish priest thinks he can cool off the gangs, but discovers it is not that easy.

The serial murders of several cab drivers causes Springer to call in a psychologist to make a profile and he acts as bait with Molly and Rich. Meanwhile back at the station, all the cops are freezing when the heating system fails.

Jessie begins dating a doctor she saved during a robbery, but when she decides to break it off, he becomes obsessed and begins stalking her.

Molly investigates a car that has plunged into the river. Lynn becomes involved in a racially charged case and becomes the subject of a reporter's TV profile.

Molly goes undercover to trap a killer that is preying on homeless people at a campground. Meanwhile Lynn befriends a deaf man who might be a witness to the killings.