An armored transport bus with Naval brig detainees on board crashes and four prisoners manage to escape.

A petty officer is murdered during Mardi Gras festivities; Pride contemplates what to tell his daughter about his strained relationship with his father.

The NCIS team must determine why a murdered Navy drone pilot was using a black market drone to obtain military surveillance, and whether the drone’s footage is linked to his death.

Pride and his team join forces with FBI Director Isler when a Russian operative, who is in the U.S. to provide intelligence on sleeper agents, disappears after his Navy escort is murdered. Meanwhile, Tammy partners with former sleeper agent Eva Azarova to locate the missing operative Eva has known since childhood.

The NCIS team investigates the copycat murder of an unsolved case from 150 years ago that spawned a legendary New Orleans ghost story. Meanwhile, Gregorio gets spooked when the case is connected to a recent séance and a local medium.

During the annual Contraband Days pirate festival, the NCIS team investigates the murder of a Navy captain who was searching for a valuable 200-year-old marble and gold fleur-de-lis.

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.