A new murder fits the style of a serial killer who was executed months earlier. Stevens must figure out if the killing is a copycat crime or if she helped convict an innocent man.

Detectives Nichols and Stevens investigate a nurse and the men who love her while looking into the death of a woman who was treated in the emergency room shortly before she was murdered.

Logan and Wheeler investigate a firefighter's stabbing death, a crime that took place after the victim prevented a hate crime.

Logan and Wheeler must sort through multiple motives as they investigate an award-winning music producer's death.

A journalist learns he has radiation poisoning and reports it to his old friend, Det. Logan, who vows to solve the case before the man dies.

The body of a bright young college student is found completely drained of blood. What appears to be a sex game gone wrong leads to a world of underground clubs, blood dealers, and a fanatical cult who believe themselves immortal.

Suspicion turns to a married astronaut after his lover is found murdered.

While investigating the murder of a food truck business owner, Nichols and Stevens uncover evidence of an affair and a possible larger scandal involving a New York senator.

After he gets into the head of an insane man driven to torture, murder, and cannibalism by overwhelming despair and loneliness, Goren surprises his colleagues with a passionate plea that the man be spared the death penalty, and engineers the confession that will save the man's life through a plea bargain.

A nanny confesses to a murder and an attempted murder that she claims God told her to commit. The link is that both victims lived in the same building, which was poorly constructed, and were rumored to be having an affair.

When Goren and Eames search for a jewel thief who murdered her accomplice, they discover that the clever larcenies are the brainchild of her lover, Nicole Wallace, Goren's long-standing nemesis. As the detectives delve into the personal and working relationships between the two women, they uncover a plot to cause the death of Wallace's ex-husband, the only person who can lead them to evidence of the very first murder Wallace committed.

When Phoebe Morton is murdered on the phone with a 911 operator, Goren and Eames take the case and soon realize Morton is one of five women murdered with a similar bent, the killer known as Body By Jake (B.B.J.). Their investigation leads them to Keith Durbin, a recently released parolee who seems to be perfect. Goren has his suspicions about Durbin, who doesn't seem right to him, and when they learn that there are similar killings going much further back, Goren and Eames soon focus their attention on a new suspect, and soon realize that even though he's not guilty, Durbin is the key.

Det. Megan Wheeler teams up with Logan on an investigation involving the murder of a womanizer.

Four men who have been friends since high school discover they're being blackmailed over the death of another childhood friend. When one of the four turns up dead, it's up to Nichols and Stevens to uncover the truth behind a 22-year-old mystery.

The detectives investigate a murder of a math student who worked in a poker club as a card-counter. Their case brings the detectives to a group of computer nerds, but later they discover a computer gambling system which has tougher suspects. The detectives discovers that even there own workstations are hit by the ringleader of the group, who had bigger plans for his horseracing and other scams.

The investigation into the murder of a crooked cop leads to a preening veterinarian and his friend, an obsessive doctor whose ex-girlfriends who have all been infected with a rare disease.

Goren and Eames investigate the murder of a former nurse and discover a possible anthrax terrorist plot. The case takes a turn for the worse when Goren is blamed for driving a suspect to commit suicide. Now disgraced, Goren learns that a cunning adversary from his past may be involved.

When Lisa Ross is brought into the emergency room with a severe case of cloracne, suspicion quickly turns to her husband Greg, a well-known dentist, especially after she dies. During their investigation, Goren and Eames hear whispers about Lisa's infidelities, but the real break comes with they learn that Lisa is not the first woman Greg Ross has been connected to who died of the same symptoms years earlier. After discovering Lisa's connection to Greg's former fiancée Morgan Dexler, Goren and Eames believe they have the answer, but they're not there yet.

A boxer's career is derailed when authorities discover he leads a dog fighting ring.

Nichols reaches out to his father for assistance when he and Stevens are assigned the case of a real estate agent who has been murdered.

A sitcom star turned Broadway actor is killed performing a stunt in a controversial and highly technical Broadway musical, and the real drama is trying to figure out who wanted the leading man dead.

The launch of a heated lawsuit over the potential theft of a multi-million dollar website leaves two bodies in the company's office. Goren and Eames enter the world of "Kizmate" – a site devoted to connecting people who share fleeting romantic encounters – and investigate its key members to determine if the killings were coincidence or something more...

It's open season in New York when not one but two powerful judges are executed. At first they seem to have no connection; one was a family court judge whose entire family was attacked, the other is an appellate court judge. After investigating the judges more thoroughly, Goren and Eames realise that their first set of suspects was simply a smokescreen, and there is a far more insidious threat. Their investigation leads them to a non-custodial father who has a beef with the court system.

The detectives find themselves in the cutthroat world of professional ballet as they investigate the murder of the star ballerina at a conservatory.

The murder of a magazine editor reveals his predilection for young girls, leaving Nichols and Stevens investigating not only his staff, but a Russian prostitution ring.