Gibbs and his team work with Pride and the New Orleans team to find Abby's brother and figure out why the passengers and crew of a private plane he catered were poisoned.
The investigation of a seaman's murder uncovers the resurface of a human-trafficking ring, while McGee hopes to spend the night with a colleague during a power outage.
Gibbs tries to connect with a wounded Special Ops sniper when an American couple is attacked in the same area in Iraq where the sniper's team was ambushed.
When an undertaker finds that one of their shipment of coffins already has an occupant, the FBI is called. The FBI calls in NCIS when they find a link to an old case.
Gibbs and the team investigate a military home invasion thwarted by a 14-year-old, while Vance and Fornell head to London to continue pursuing the escaped British spy.
The NCIS, FBI and MI6 teams continue the international manhunt for an escaped British spy who's targeting current and former agents. Anthony DiNozzo bids farewell to NCIS.
The team investigates a car explosion with a connection to an agent who went missing six months earlier; Gibbs asks NCIS Special Agent Alex Quinn to shadow his team.
A marine sergeant falls from a building, it appears she attempted suicide, but her psychiatrist, Dr Grace Confalone, urges Gibbs to investigate her attempted murder.
Gibbs sends Bishop and Quinn to Philadelphia to work with MI-6 Officer Clayton Reeves on the murder case of a British operative. Meanwhile, Quinn deals with the NCIS case that caused her to leave the field.
Torres breaks protocol when he identifies a suspect that is wanted by ICE; Abby, McGee, and Bishop try to woo Anthony DiNozzo, Sr. Into subletting his son's apartment.
Bishop questions her previous work at the NSA when she's sent to Gitmo to collect evidence for a Navy chaplain murder case. In the meantime, her brothers visit for Thanksgiving and want to know from her co-workers who she's dating.
