A Navy Lieutenant JAG lawyer that appeared to have a happy life is found dead by her parents in an apparent suicide. Capt. Bud Roberts helps in the investigation.
When the body of a missing Navy commander is found, Gibbs and his team are ordered to work with former FBI agent Tobias Fornell, the private investigator who was hired to find him.
NCIS makes a deal with Paul Triff to give him a 48-hour furlough at his former residence, now McGee's home, in exchange for information to convict Gabriel Hicks.
NCIS searches for a petty officer suspected of assault who escapes when the sheriff transporting him crashes into a lake. Also, Torres works closely with Annie Barth, a key blind witness who heard vital evidence needed to solve the case.
A daughter begs Gibbs to investigate her mother's murder because she believes the police convicted the wrong man. Abby receives a hard to get reservation at a new restaurant that is cold like an igloo.
When evidence reveals an NCIS team member is a hitman's latest target, the team must search through old case files to determine who is seeking vengeance.
While Gibbs attends the memorial service for a friend who was lost at sea, he discovers that the deceased has been hiding in a fallout shelter after his boat was attacked and he swam to shore.
At a Halloween crime scene, Torres recognizes the NCIS victim as a former friend from federal law enforcement training, and Jimmy thinks his lab may be haunted!
After the lead suspect of an unsolved high-profile burglary case is released from prison, the team resumes their investigation with an undercover stakeout.
The team's holiday plans are put on hold after the murder investigation of a Navy veteran includes the discovery of a newborn baby with no identification.