In Season 14, a bomb plot is uncovered following a death at a Quantico reunion, a marine falls to her death and the murder of a petty officer is linked to the disappearance of an MI6 agent.
The American naval crime drama returns, joined by a new recruit played by Jennifer Esposito. The team investigates a deadly car explosion in DC that seems to be connected to Special Agent Nick Torres's disappearance six months earlier, while on a deep-cover operation in Argentina.
NCIS detectives uncover a bomb plot and a long-running theft ring while investigating a death at a Quantico reunion. Elsewhere, Torres and Quinn adjust to life on Gibbs' team, but find new seating arrangements in the squad room just one of the things causing tension to mount. Mark Harmon stars.
When the NCIS team investigates a marine sergeant's fall to her death from a building, her doctor, Dr Grace Confalone, confides in Gibbs urging him to consider this a murder investigation. Meanwhile, Torres searches for a place to live.
After the body of a navy lieutenant is discovered aboard a destroyer during a `tiger cruise', a time when civilian guests are allowed to spend the night on the ship, Gibbs, Quinn and Palmer travel out to sea to investigate. Meanwhile, McGee contemplates the perfect proposal for Delilah Fielding.
When a missing MI6 Officer is linked to a murdered petty officer, Gibbs sends Quinn and Bishop to Philadelphia to work with MI6 Officer Clayton Reeves. Meanwhile, Quinn painfully recounts the NCIS case that made her leave field work.
A petty officer is kidnapped, but manages to escape her captor. The NCIS team members investigate and soon discover a possible connection to her missing husband. Meanwhile, Abby knits both Quinn and Torres personalised `gifts'.
Torres boldly breaks protocol when he learns a witness in an NCIS case is wanted by US Immigration and Customs Enforcement. Meanwhile, Bishop and McGee hope to sublet Tony's apartment - by wooing his father, landlord Tony DiNozzo Sr. Robert Wagner guest stars.
Ellie questions her previous work at the NSA after she is sent to Gitmo to gather evidence for a Navy chaplain murder case. Meanwhile, Bishop's brothers visit for the Thanksgiving holiday and pester her co-workers to find out who she is dating.
An investigation into the murder of a US Navy captain brings to light a link to Ducky's late mother, prompting the medical examiner to question a decision he made 37 years earlier. The team members exchange holiday gifts as Gibbs spends Christmas dinner with Fornell.
The team searches for new leads after an undercover operation to apprehend a businessman who apparently uses acts of terror to manipulate the stock market is compromised. Bishop and Qasim join forces to find a break in the case.
After Gibbs spots the brother of an NCIS Most Wanted suspect, he immediately assumes his former alias and goes undercover with their infamous anti-government militia. Meanwhile, Bishop and Reeves partner on an off-the-books investigation.
The murder of a petty officer in a small town outside Washington, D.C, prompts the team to once again partner with The Sherlocks, a privately funded investigative team that includes their newest member, Anthony DiNozzo Sr. Mark Harmon stars.
McGee discovers his flat has been torn apart by a robber trying to locate an item of great value hidden somewhere by the convicted criminal who previously owned the unit. Mwanwhile, congress woman Flemming tries to persuade Director Vance to pursue a career in politics. Mary Stuart Masterson guest stars.
When a US Marine is murdered at an event for the Honor Flight Network, a non-profit that arranges for veterans to visit the Second World War, Korea and Vietnam War Memorials for free, the NCIS team members have to rely on irritable Vietnam War veteran Henry Rogers, who seems to be the key to finding the culprit.
After a vice admiral's laptop is infected with ransomware, he enlists McGee and the NCIS team to track down the hacker before the computer virus eliminates his personal and professional files. Bruce Boxleitner guest stars.
The stress of McGee and Delilah's imminent wedding takes its toll, as the would-be bride is rushed to hospital. Meanwhile, the NCIS team travels out to sea after an apparently healthy petty officer aboard a Navy destroyer dies mysteriously in his sleep.