Barek and Logan investigate when the deaths of two young girls seem to be connected to a voodoo-practicing nurse. Things turn interesting when it seems the young woman has placed a voodoo curse on Logan.

Goren and Eames investigate when a respected professional is found murdered in the East River, his death presumably connected to a series of gambling losses.

Goren and Eames investigate a fire at St. Gerald's which led to the death of a Church employee and soon realize that an arsonist around town is targeting churches. Throughout their investigation, they realize that St. Gerald's was the arsonist's primary target, and clues lead them to Justin Reid, who had donated $100,000 to rebuild the Church, his step-mother Regina, whom they soon learn had seduced Justin when he was only a teen, and his half-brother Glynn, who works for a clean-up crew that had worked at all the churches that were burned down shortly after they were renovated. Deakins comes under fire when an e-mail surfaces that insinuates he got Martinez (from <a href="http://www.tv.com/law-and-order-criminal-intent/to-the-bone/episode/730599/summary.html">To the Bone</a>) to lie about the Logan shooting by getting him a promotion. The e-mail is soon traced back to former cop Frank Adair (from Season 4, Ep. 22 - My Good Name), who is doing time for murder.

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.

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.

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.

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.

When a schizophrenic obsessed with Marilyn Monroe and the cult of the blond and the blue-eyed commits a series of murders to eradicate those he feels are responsible for promoting the homogenization of appearance rampant in society, Goren and Eames suspect that a person close to the man may have taken advantage of his illness and his crimes to commit extortion.

Logan and Barek investigate after a body is found in the ocean, having fallen from an airline wheelwell. They soon discover that she is just one in a long line of prostitutes to be beaten and murdered. Their investigation leads them to a nervous airline employee, but they just don't feel he has the courage or the violent nature to commit these crimes on his own. A family connection leads them to a second suspect, with a history of both being abused and being the abuser.

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 become suspicious when an abusive lawyer's girlfriends keep turning up dead, but his wife stonewalls the investigation.

Goren gets an interim partner when Eames goes on maternity leave, and focuses his investigation of a murder on a star reporter whose past contains a history of plagarism.

Goren and Eames investigate the murder of a Russian mob princess, initially believing she may have been slain in a revenge act against her father, but their attention later turns to a classmate who could be destroyed by the woman's upcoming tell-all book.

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.

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...