Williams discover that Rev. Harris may be part of the bombings. Nina moves in with Eddie.

Williams befriends a woman whose boyfriend is a leader of a gang that robs apartments. Eddie asks Nina not to go back to work.

A recently released child molester is a suspect of a rape of an eleven year old girl. G is in trouble at school.

Nina and McNamara work together on a case where two robbers are murdered. Nina freezes in battle and decides to turn in her gun. G hangs out with young thieves.

A war happens between east coast and west coast rappers when a california rapper is shot.

Torres's father dies of a drug over dose and Torres believes that it was suicide. Williams tries to get custody of G.

Nina's new undercover case questions her future as a cop.

Toress goes undercover at an AIDS clinic to solve a murder case of a bisexual man. Cooper and Captain O'Bryne start to become closer.

Williams goes undercover as a security guard. McNamara's discovers more of his father's case. Captain O'Bryne confesses his love for Cooper.

Torres and Nina become involved with two feuding Latino gangs.

Lt. Cooper is taken hostage in her office by a man threatening to blow up the precinct if his son is not reprieved from a death-row sentence. Nina learns that the daughter she gave up for adoption 11 years ago wants to meet her.

A thirteen-year-old boy has a videotape of a murder. Torres and Williams try to protect him; The boy's mother turns out to be Williams's old high-school girlfriend, whom he betrayed by sleeping with her best friend, Chantal.

Feds may be part of a drug case and McNamara might lose it all to prove it. Cooper and her husband tell their kids about their separation.

Nina's daughter (whom she gave up for adoption) has been kidnapped and held for ransom.

The detectives have to prove that a Gulf War veteran has stolen missles. Williams meets with G's french teacher about G's crush on her.

Williams discover evidence relating to Martin Luther King Jr's murder.

Nina and McNamara go undercover to find out who tried to kill an executive. Williams and Natasha get close.

A female bounty hunter uses Williams to help find a fugitive in protective custody. Nina and McNamara suspect a wife a recently deceased cop. Natasha visits the precinct.

The detectives suspect a mother of being involved in a carjacking involving her two children. Nina deals with her custody battle for Melissa.

McNamara goes undercover involving a Chinese Mafia that has a link with his father's death. Torres asks his sister for money to buy an engagement ring for Nina.

Williams investigate a case where a girl feel down and elevator shaft in her building. Torres goes shopping for Nina's engagement ring.

Willias go undercover at a prison to find evidence that will catch a drug lord. William's new friend in prison becomes involved in a murder. Torres purposes to Nina.

The detectives go after a bank robbery ring. Torres and Nina get married.