After tracking Apollyon, a deadly underground spy network, to war-torn South Ossetia, Pride is separated from the team and faces grave danger. Also, in order to save Pride, the NCIS team must locate a mole who continues...
Special Agent Hannah Khoury joins the team as they search for a former IRA bomb-maker who was smuggled into the country. Meanwhile, Pride considers a new position with the agency during his medical leave.
While NCIS investigates the murder of a Navy intelligence officer killed during a conference for foreign diplomats, the key witness cozies up to Sebastian. Also, Pride has some trouble adjusting to his new position at the agency.
The NCIS team uncovers evidence of a suspect who is harvesting organs from multiple victims after Pride's assistant, Ginny Young, escapes from a kidnapper. Also, Pride turns to his friend, Commander Calvin Atkins, M.D., for medical and spiritual guidance as he struggles with the ramifications of his recent brush with death.
NCIS investigates the disappearance of a Navy entomologist after a deadly shooting at a research lab. Nero, with Naval Intelligence, joins the investigation when the team discovers a rare and deadly virus was also stolen.
The team investigates multiple murders tied to a construction company that creates an experimental chemical that strengthens sea walls; evidence from Hannah's previous mission in Oman is used against her.
Tammy is convinced that a con man committed the hit-and-run murder of a Navy doctor, even though the evidence shows otherwise. Also, unbeknownst to Hannah, her husband, Ryan Porter (Hal Ozsan), approaches Pride with new intel on Apollyon, the underground spy network responsible for murdering his father.
After tracking Apollyon, a deadly underground spy network, to war-torn South Ossetia, Pride is separated from the team and faces grave danger. Also, in order to save Pride, the NCIS team must locate a mole who continues to feed information to Apollyon.