Rafi Silver

Olivia and Peter enlist the help of Dr Walter Bishop, Peter's father, in stopping the spread of an unexplained phenomenon.

Agent Bishop questions her previous work at the NSA after being sent to Gitmo to gather evidence for a Navy chaplain murder case; Bishop's brothers visit for Thanksgiving.

An operation to catch a businessman who is using acts of terror to manipulate the stock market is compromised, forcing the NCIS team to search for new leads.

The owner of a small postal store is murdered -- and a connection to the illegal diamond trade is revealed; Capt. Gregson hits a fellow officer, putting his career at risk.

The team finds a link between a murder in Washington, D.C., and a terror group holding a Marine hostage overseas; DiNozzo is annoyed that McGee was chosen to be featured on recruitment brochures.

Bishop is determined to get revenge for the murder of her late boyfriend, Qasim, after Gibbs and the team find a new lead in the Chen case; Torres teaches the agents the art of pickpocketing.