The team investigates an incident that caused mass casualties in New York City; Maggie finds herself questioning her co-worker's seemingly troubling behavior.
Detectives Ed Green and Nina Cassady suspect a former senator of the murders of his ex-wife and another family member, and the trial becomes a media frenzy.
Two men who committed suicide by lethal injection lead the detectives to investigate a father and daughter tandem notorious for assisting with suicides.
Detectives Ed Green and Cyrus Lupo search for missing pants and investigate a crooked corporation that may have benefited from the murder of a young lawyer.
Three roommates are thought to be victims of suicide, but information involving the victims and their discreet relationship with a politician changes opinions.
A drunken high school girl is found murdered after leaving a party, but a cab driver's information leads them to a drug-addicted prostitute and her pimp.
A psychiatrist is found murdered in his office and one of his patients is initially suspected of murder, but detectives dig up information on a jealous wife.
Police find a woman's finger inside a dog when they crack down on a dog fighting ring, and the finger is later linked to a dead woman who was nearing a divorce.
The team visits a family-owned night club while investigating a petty officer's murder; Lasalle gets an unexpected call from his family and rushes back home.
A petty officer trying to help a family of refugees is murdered; Wade works on the mayor's special election campaign, which happens to be during Mardi Gras.
An FBI special agent needs Pride's help with an investigation into opioid theft; Percy goes undercover with Isler as the backup for a job related to the case.
A Navy officer drives a recently freed inmate home shortly before their death; Palmer struggles with a personal trauma and Gibbs tries to help him through it.
Gibbs and Sloane search for a group of missing girls in Afghanistan; McGee, Bishop and Torres pursue a hacker who leaked dangerous information to the Taliban.
A victim's body is found frozen in the back of a food truck, which sends the team on an investigative journey into the competitive world of food trucks.