A petty officer’s murder leads the team to a family-owned night club where Pride’s mother used to perform weekly. Also, Lasalle must urgently return home to Alabama after receiving an unexpected call from his family.

The team places Mateo Diaz, a high school gang member turned informant, in protective custody while they investigate the murder of his junior reserve officers' training corps instructor; Pride needs his brother's help to gain Mateo's trust.

The NCIS team investigates the murder of Patton's friend, a former Navy Seal gunned down in a drive-by shooting while Patton helplessly watched.

Sebastian calls the NCIS team to assist with a possible kidnapping case when a dignitary's son he was assigned to protect disappears from a local concert venue

When a Navy sailor is found dead, the team tracks the suspicious movements of people in his life prior to his death. Also, Hannah comes to terms with her daughter's relationship with her ex's new girlfriend, Veronica.

When a torpedo hits a fishing trawler at sea, the entire Gulf Coast is in jeopardy as Pride and NCIS race to find the submarine before it can strike again.

When a Petty Officer is shot down by a sniper, Pride and NCIS hunt down the killer, only to find that he may not be acting alone. Also, Rita tells Pride that she has been offered a compelling job... in Kansas City.