Callen goes undercover to infiltrate a network of Chechen terrorists who are recruiting foreign fighters to join their cause and planning their next attack in the U.S.

NCIS investigates the robbery of a high-end arts storage by going undercover as potential buyers on the black market, to find who is behind the stolen items.

NCIS investigates the robbery of a high-end arts storage by going undercover as potential buyers on the black market, to find who is behind the stolen items.

As Callen continues hunting Katya, Kilbride enlists NCIS to help find a truckload of stolen guns. The assignment becomes more challenging when their suspect, the son of a mob boss…