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The team investigate the murder of an American petty officer whose body was found aboard a British ship.
The team investigates the death of a naval officer who was killed live on air. Their job is made more difficult by the discovery of a number of different suspects.
The team worries about Abby when she becomes too involved with solving the murder of a naval scientist.
A dying message from a naval officer leads the NCIS team to a manuscript that may hold a threat to national security.
Vance creates a task force to catch a serial killer who murders service personnel after they land in ports.
When a Pentagon security camera catches a petty officer committing a murder, the NCIS team set out to track down the killer.
The team is surprised when Gibbs asks DiNozzo's father (Robert Wagner) to join them in a murder investigation.
The team has to protect Ziva's father when he attends the NCIS conference.
An ambush changes the course of the NCIS team's investigation.
Tony's former partner is found murdered and linked to the Port-to-Port serial killer, Tony remembers his days as a detective in Baltimore.
The NCIS team chase every possible lead when the latest victim of the Port-to-Port killer turns out to be someone with personal ties to the team.
When the Port-to-Port killer is finally revealed, the entire NCIS team find themselves in grave danger.
When a Navy petty officer who was supposed to testify in an upcoming murder trial goes missing, the NCIS team gets help from the deputy district attorney to find the witness.
The NCIS team partners up with the Coast Guard Investigative Service when they have to investigate the murder of a marine on a dinner boat cruise.
When a recruitment session of a petty officer results in murder, the NCIS team sets out to find the culprit by teaming up with Ducky's predecessor.
After spending months tracking down his target from the secret assignment given to him by the Secretary of the Navy, Tony is left with a dead NCIS agent.
The NCIS team must search through garbage during the investigation of a young Marine who arrived at his homecoming celebration after being stabbed.
The line between McGee's personal and professional life is blurred when Gibbs and the team discover a piece of key evidence in a murder investigation.
Hardboiled: Torres receives intel from a confidential informant regarding top secret naval information. [R]
With the victim's wife and child missing as well, the NCIS team has to locate both the family and the murderer.
The team has to undergo mandatory psychological evaluations while investigating the death of a naval commander.
The NCIS team is given the job of protecting the Belgravian prime minister's daughter while she studies in the USA while also investigating the death of a marine.
NCIS looks into the reason behind a contract assassin targeting a Navy Lieutenant Commander; Abby uncovers new information about her family.
When a Coast Guard officer is gunned down on a cargo vessel, the NCIS team searches for the killer, but finds a Lebanese family seeking refuge on American soil.
NCIS investigates the strange circumstances surrounding the murder of a Navy lieutenant who died of forced over-hydration; Gibbs meets Ducky's love interest.
The NCIS team has to find a ruthless murderer after the dismembered fingertips and teeth of a murdered marine are found in a pickpocket's stolen purse.
When an ex-NCIS research assistant is found dead, attention turns to the fraudster case he was working on.
Gibbs begins to question Vance's motives after finding inconsistencies in an investigation that suggest that the accused teenage drug addict is innocent of murdering his father.
The NCIS team partners up on an investigation when Gibbs and Fornell get a call for help from their mutual ex-wife whose husband gets suspiciously kidnapped.
The NCIS team investigates a discrepancy in the DNA remains of a military plane crash that was responsible for transporting the caskets of deceased soldiers.
The NCIS team continues its search for a missing Marine in Afghanistan; Tony reveals his deepest fears; Gibbs is forced to relive events from his past.