A burglary occurs at a cyber-security company, but Callen is forced to steer clear of the investigation when Hetty tells him that his girlfriend, Joelle, is one of the lead witnesses. Meanwhile, the team discuss their personal holiday travel plans.
A marine's distraught widow questions the circumstances surrounding his death in combat, so Sam and Callen investigate to determine if there is a cover-up. Meanwhile, the team fears that Hetty is ordering another brutal evaluation when she brings in a psyc (more…)
Part 1 of 2. Callen and Sam fly to Idaho and join forces with NCIS: Red, a mobile team of agents who live together and investigate crimes in various locations, when a murder weapon found there matches one used in a national security case in Los Angeles.
A Navy lieutenant dies and a pilot is hospitalized after they both drink from a communal water jug that is laced with cyanide. The team investigates to determine whether it is an isolated incident or an early test for large-scale water contamination.
Kensi and Deeks are sent to Mexico to investigate the theft of a cartel boss's body, after a DEA special task force brings the ruthless criminal down. Back at home, Callen and Sam look into whether there is a leak in the DEA.