A jeweler's murder may have ties to a prostitution ring. Once the case goes to trial, D.A. McCoy's job is on the line as favors are called in.

An online romance may be at the heart of a mechanic's murder, but Detectives Lupo and Bernard must unravel some truly bizarre developments before the full story is known.

A legal aid strike ends in the death of a paralegal, and the investigation leads to a golf pro who proclaims his innocence, again. Then the case takes an even stranger twist when Rubirosa is pitted against Cutter because of the strike that started it all.

A novelist's apparent suicide changes to a murder investigation. The suspects include a cult and her husband. Cutter's case is jeopardized by the defense attorney's indirect juror tampering tactics of scaring the jurors.

Internal Affairs takes a special interest in Detective Green after he shoots a gambler that may be connected to a current case. The investigation turns up a part of his past he's taken pains to conceal.

A recorded conversation has Lupo and Green delving into the personal and family life of a murdered art dealer, and suspected connections to terrorist activity.

When the police shut down a dog-fighting ring, the investigation becomes a murder case after a woman's finger is found inside one of the dogs; things get more complicated as the case deepens, and the interest of a pushy reporter is sparked.

The murder of a psychiatrist focuses the suspect list to his clients and wife, and the defense of the murderer will challenge the D.A.'s office to somehow show the jury that a bad childhood is not a justification for crime.

A high school party turns tragic when a teenager is found dead, and the detectives end up playing games with the two leading suspects to find out the real story. Unfortunately, unwanted attention from a juror for A.D.A. Rubirosa may disrupt the trial.

A case of mistaken identity leads Green and Lupo to suspect that a murdered doctor may have been in the wrong place at the wrong time.

A riot at an immigration rally ends in murder, and the political climate causes McCoy to assign a special prosecutor increasing tensions at the office.

A hit-and-run investigation leads back to a title company, but Green, Rubirosa and Lupo's undercover work takes a surprising twist that pits McCoy against the U.S. Attorney's office.

A triple homicide has ties to a politician, but he may be just the first step toward the truth and a killer who will take desperate measures to keep his freedom.

Lupo and Green investigate after a white teenager (David Kendall) and a young black girl (Tanya Anderson) are shot and killed in a local neighborhood. The investigation stalls when no one is willing to talk, but the detectives later learn that the victim had earlier had an altercation with someone in the neighborhood that led to a surprising altercation later that evening.

The investigation into a pair of missing pants leads to the murder of a young lawyer. Lupo and Green soon turn their suspicions to a businessman who works for a shady multinational corporation called SavingsMart.

Green and Lupo investigate after a package explodes at a scientific research lab, resulting in the injury of a pregnant security guard. The investigation soon turns to the scientist's latest experiments.

Lupo and Green's first official case together is a kidnapping that happened during a citywide blackout; a housekeeper is slain and a mother and daughter are kidnapped. The evidence that links all the kidnappers is the father and husband of the kidnap victims. When they search the kidnappers' hideout, they find preparations which implies that the kidnappers knew that the blackout was coming. Cutter must convince the man to testify after he has lied about a search warrant to save the man's daughter, or else the kidnappers will all go free. Issues of a warrantless search arise. Courtroom scenes revolve around questions of Enron-like manipulation of energy.

Det. Cyrus Lupo returns to New York after serving four years abroad in the Intelligence division after learning his brother committed suicide. Lupo and Green reluctantly partner up to investigate another suicide committed the same way and soon find a suspect in a parolee known as "Dr. Death".