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.
Ziva surprises Gibbs with a cryptic warning, prompting him to question why she remained underground for years while being presumed dead by family and friends.
With their lives in danger, Gibbs and Ziva's rogue investigation takes an unexpected turn when a possible terrorist plot is revealed.
The team search a missing Marine's campsite and realise he was not alone, so they search for his camping partner, who may still be alive.
The team link a bizarre crime scene at Arlington National Cemetery to a string of attacks on homeless veterans.
The team investigate a Marine Corporal after after evidence suggests she murdered her neighbour while being treated for insomnia by a hypnotherapist.
When the son of a petty officer is murdered in his prison home, evidence suggests that Kasie's lifelong best friend, Dante Brown, is the suspect.
While investigating a Marine's murder, the NCIS team uncovers a labyrinth of live-streaming spy cameras hidden in the rooms of a Virginia motel.
The team investigates the murder of a musician who played in the Navy's best band, which performs at diplomatic events around the world.
The team investigates a petty officer's murder that was livestreamed on a popular gaming app. Gibbs is asked to look after his neighbour's son when she leaves on a last-minute trip.
Gibbs and the team help Ziva with the one thing she said she'd take care of before returning to her family.
Gibbs is forced to face the consequences of his actions after helping Ziva deal with the one thing she wanted to finish before reuniting with her family.
The NCIS team gear up when the pilot of an F-18 disappears after crashing the plane. McGee hesitates to talk about something personal with his teammates.
A dead body is found at a testing site for unmanned aerial vehicles.
Torres fights for his survival in the ICU after he and Bishop become victims of a hit-and-run.
The lead suspect in a murder investigation is a woman that Gibbs' friend, Phillip Brooks, met on a dating site. Sloane has a secret admirer on Valentine's Day.
The team investigate the suicide of a retired Navy officer who left a rare, valuable - and possibly stolen - coin to the National Museum of the Navy.
A Navy officer is found murdered the same way his parents were murdered a decade ago. The team then stumble across a storage container filled with dollhouses that display recreations of murder scenes.