Season 14 ends with Gibbs, McGee and Torres traveling to a remote area in Paraguay that is controlled by a group of violent rebels, in an attempt to locate a missing Navy SEAL who disappeared during an unsanctioned trip.
The stress of McGee and Delilah’s imminent wedding takes its toll, as Delilah is rushed to the hospital. Meanwhile, the NCIS team travels out to sea after a young and healthy petty officer aboard a Navy destroyer dies in his sleep.
A Marine sergeant is murdered in a national park, and Gibbs and the NCIS team partner with mounted police to solve a string of related crimes in the park.
Torres must rely on old case notes and contacts after a Marine’s murder is linked to a former dirt bike gang he joined for a year-long undercover operation.
A vice admiral’s laptop is infected with ransomware and he enlists McGee’s help to track down the hacker before the computer virus eliminates his personal and professional files. Meanwhile, Alex takes time off to assist her mother, after she receives a 911 text.
A Marine is murdered at an event for the Honor Flight Network, a non-profit that arranges for veterans to visit the World War II, Korea and Vietnam War Memorials in Washington, D.C., for free. The NCIS team is forced to rely on a cantankerous Vietnam veteran to provide details on the victim’s whereabouts throughout the day he was killed.
Gibbs honors a sailor’s dying wish and re-investigates a closed case that was originally deem an accidental death and discovers it was actually murder. Meanwhile, the probe reminds Torres of a tragic time from his past.
McGee’s apartment is torn apart by a robber searching for an item of great value that was hidden there by a convicted criminal who previously owned the unit. Meanwhile, Congresswoman Flemming tries to persuade Vance to pursue a career in politics.
Bishop becomes more determined than ever to seek revenge for the murder of Qasim, her late boyfriend, after Gibbs and the team find a new lead in the Chen case. Meanwhile, Torres teaches the agents the art of pickpocketing.
Part 1 of 2. When Abby’s homeland security think tank is compromised, it’s discovered that a theoretical terror playbook has been stolen and is being auctioned on the black market. The episode concludes on “NCIS: New Orleans.”