Ziva surprises Gibbs with a cryptic warning, prompting him to question why she remained underground for years while being presumed dead, and what led to her return.
After a body is found hidden under an 18-wheeler delivering to the Navy yard, the team tracks the vehicle's previous locations to pinpoint the crime scene and suspect; Sloane encourages the team to talk about Ziva's recent reappearance.
The team links a bizarre crime scene at Arlington National Cemetery to a string of attacks on homeless veterans; Vance orders McGee, Bishop and Torres to complete hours of evidence garage cleanup duty for withholding information.
The team investigates a Marine Corporal after she finds a gun in her house. The gun is linked to a murder, but the Marine had no connection with the victim and was fast asleep when the crime was committed.
When a Petty Officer's son is found murdered at his welcome home from prison party, evidence suggests that Kasie's lifelong best friend, Dante Brown, is the suspect.
The NCIS team investigates the murder of a musician in the Navy's most elite band, which performs at diplomatic events around the world. Gibbs gives McGee the lead when he unexpectedly takes some leave time.
The team investigates a petty officer's murder that was live-streamed on a popular gaming app. Also, Gibbs is asked to look after his 9-year-old neighbor, Phineas, when his mom must leave on a last-minute trip.
The NCIS team investigates an F-18 crash and subsequent disappearance of the pilot; McGee reluctantly discusses a very personal decision with his teammates
After a body is found at an unmanned aerial vehicle testing site, the NCIS team must determine if the death was murder or an accident. Also, Palmer carefully interviews medical examiner assistant candidates.
The lead suspect in an NCIS murder investigation is a woman Gibbs' friend, Phillip Brooks (Don Lake), met on a dating site. Also, Sloane has a secret admirer on Valentine's Day.
While investigating the suicide of a retired Navy officer who left a rare, valuable - and possibly stolen - coin to the National Museum of the Navy, the team imagines themselves in his life story in order to piece together how the coin ended up in his possession.
The NCIS team investigates the death of a Navy Petty Officer murdered the same way as his parents a decade ago. They stumble across a storage container filled with dollhouses that display recreations of murder scenes. Also, the team agrees to clean out their living spaces, but some have a harder time saying goodbye to their possessions than others.
The team searches for answers when the body of a well-regarded Navy technician in the Reserves is found floating in a lake where a popular community event is being held. Also, Sloane is caught off-guard when her daughter, Faith (Kate Hamilton), makes an unexpected request.
While investigating an off-base burglary at an Admiral's residence, NCIS becomes involved in a case of an older man that claims to be a Pearl Harbor survivor. He wishes to have his remains buried on the USS Arizona.
