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.

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.

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.

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.

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.

Lynn deals with the heartbreak of notifying a dead man's next-of-kin, while a basketball player falls in love with Molly when she insists on playing basketball with them.

Stanton starts to resent Whelan while Schiller gives Sarah some good advice on handling Kelly who has just gotten the results of his sergeant's examination.

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.

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.

On the first shift, Lynn Stanton finds a parent whose missing TV is more important to her than her missing kids; Molly Whelan gets no slack from her partner; and Sarah Berkezchuk is bloodied by a brick thrower.

Whelan has to appear in court to testify against a woman who assaulted her but things don't go planned. Meanwhile the Berkezchuks argue over money issues.

A man threatening to jump from a bridge will only let rookie officer Berkezchuk on the ledge with him to talk him down.

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 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.