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.

Logan jeopardizes his and Wheeler's careers when a priest convinces him to re-open a murder case that's over a decade old which involves a politically-aspiring ADA who will stop at nothing to keep the truth buried.

Bobby is visited by the past when he finds a picture at his mother's grave indicating an old nemesis has returned, and the case only gets more complex when his brother and a mentor reappear.

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.

Genetics drive the murder of a doctor and the subsequent investigation.

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.

Goren and Eames search for a young boy who vanished during a robbery at a hotel.

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.

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.

A rape trial goes wrong when a witness is killed, but the likely suspects – the football team members accused of the rape – turn out not so likely, and attention turns towards an attorney.

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.

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.

Goren and Eames investigate a case involving a councilman's step-daughter and her boyfriend being shot. The pair of drug-addicted kids were caught up in blackmail schemes which had targeted the politically powerful family of the woman.