The Department of Justice target a member of the team. Leon delivers unsettling news to Hetty.

After the U.S. Treasury Department is hacked, Nell and Eric go undercover inside a couple's retreat to track a tech-savvy husband and wife linked to the crime. Also, Digital Forensics Specialist Dave Flynn (Scott Grimes) arrives from the NCIS cyber office in San Diego to run ops while Eric and Nell are on assignment.

The NCIS team tracks a highly skilled assailant determined to avenge her father's death by killing a Brazilian diplomat.

NCIS investigates the murder of a federal prison inmate who was the adopted daughter of a notorious counterfeiter. Also, Callen is summoned by the Alcohol, Tobacco and Firearms (ATF) Internal Affairs board to discuss Anna Kolcheck’s actions during a joint NCIS and ATF case.

The NCIS team is joined by NCIS Special Agent Nicole DeChamps after a Marine reservist with a history of PTSD disappears following a drunk and disorderly altercation.

After Anna Kolcheck escapes from prison with her cellmate, Callen and the NCIS team assist with the investigation and search for her whereabouts.

The NCIS team travels to Cuba for an unsanctioned mission after Callen gets a lead on Anna Kolcheck's (Bar Paly) whereabouts.

CIA Officer Veronica Stephens asks the team for help when an agricultural engineer Hetty asked her to bring to the United States disappears