NCIS stands for Naval Criminal Investigative Service. The series chronicles the operations of an elite team of special agents whose mission is to investigate any crime that has a shred of evidence connected to Navy and Marine Corps personnel, regardless of rank or position.
When the lead suspect of an unsolved robbery case is released from prison, the NCIS team resumes their investigation with an undercover stakeout.
An NCIS Special Agent leads a team of skilled investigators as they scrutinize evidence that links crimes to Navy and Marine Corps personnel.
United States Secretary of Defence Wynn Crawford shuts down Gibbs' murder investigation and demands that Special Agents McGee and Torres be arrested.
An old family friend pleads with Gibbs to join him on a road trip; a Navy lieutenant in NCIS protective custody is poisoned by an infamous drug dealer.
A malnourished 9-year-old girl is found, the team suspects the girl is the daughter of a Navy recruit who disappeared 10 years ago; Bishop discovers notes that were kept on the case.
McGee reluctantly visits his old high school after the unique computer password he used as a teenager is linked to a Department of Defense contractor's murder.
A man is killed after he is tossed overboard a Navy destroyer that was out at sea, as Torres grows increasingly frustrated with Vance's latest assignment.
Jimmy's father-in-law asks him to tamper with evidence for an ongoing murder investigation; one of Ed's poker friends offers his assistance to close the case.
The Pentagon notifies Director Vance that a nuclear submarine, which Gibbs and Bishop are performing an investigation aboard, has suddenly gone radio silent.
Torres puts his faith in the team's investigative skills when he is trapped aboard a run-down fishing boat with no memory of the past 12 hours.
Following an active shooter lockdown at a naval hospital, the team searches for a suspect who fled the scene; someone from Sloane's past is a key witness in the case.
NCIS investigates the murder of a Marine major believed to have been killed in the 9/11 attack on the Pentagon; a personal history with the victim drives Gibbs to solve the crime.
After entering cold case DNA into the system, Kasie solves a 30-year-old murder case, but a loophole in the legal system may set the suspect free.
After NCIS finds a secret government bank account that's funding a nationwide network of vigilante justice, the team must determine who is acting as judge and jury.
The team investigates the murder of a Marine sergeant who was hailed as a war hero for his efforts overseas; Gibbs turns to Dr Grace Confalone for advice.
A former FBI agent pleads with Gibbs to take down drug dealers after his daughter is hospitalised from an opiate overdose; Gibbs is haunted by the case and his personal history.