During one of the year's hottest days, first responders reel from horrific accidents that happen across the city; Buck's sister surprises him with a visit.
A high-rise hotel crumbles under its weight after a massive earthquake shakes the city o f Los Angeles; Athena faces wreckage from a fallen freeway overpass.
Matt adjusts to spending time with his family and growing his businesses; Anansa struggles with celebrating the twins' birthday without offending their mother.
The NCIS team must undergo a psych evaluation by an inquisitive psych evaluator while investigating the death of a naval commander shot onboard a Navy vessel.
A failed assassination attempt in Belgravia forces the NCIS team to protect the Defense Minister's daughter, who is studying in the U.S. and smitten with McGee.
NCIS is called in after a pickpocket discovers that the purse he recently stole contains the dismembered fingertips and the teeth of a murdered marine.
NCIS discovers one of its former investigative assistants found murdered was selling details to a crew planning to rob a warehouse; a new agent joins the team.
Vance is eager to have Gibbs interrogate a boy and evoke a confession after his father, a retired Marine, is found dead and all evidence points to him.
NCIS connects a message left in blood by a murdered Navy commander to a manuscript containing information that could become a threat to national security.
The team is forced to follow Special Agent E.J. Barrett's lead in the case of a seaman's death that may be connected to a series of port-to-port murders.
A Navy lieutenant's murder caught on a Pentagon security camera, revealing a suspect; Gibbs announces that Barrett's team will handle the Port-to-Port case.
The members of the NCIS team have their own lives put in danger when they reveal the identity of the Port-to-Port killer, who has his sights set on the team.
After spending months tracking down his target from the secret assignment given to him by the Secretary of the Navy, Tony is left with a dead NCIS agent.
When a coast guard officer is gunned down on a cargo vessel, the NCIS team searches for the killer, but finds a Lebanese family seeking refuge on American soil.
Hondo's life and career are put at great risk as he follows his godson's kidnapper; Street and his mother get used to life after her release from prison.
Hondo and Deacon evade a group of armed mercenaries who are chasing them in the Angeles Mountains; Chris overreaches in her attempt to assist a female trainee.
Hondo and the team are prompted by a fake 911 call to stop a group of white supremacists; Street's relationship with his mother puts his job in possible danger.