A former Marine is suspected of creating a chemical weapon, prompting the special ops team to join the FBI's domestic terrorist task force on tonight's NCIS: LA. Watch a sneak peek here.
On this week's NCIS: Los Angeles, the team investigates a possible terrorist attack against the Vietnamese Consulate. Will they find out who is really behind the plot?
On tonight's NCIS: Los Angeles, Sam and Callen go undercover on their fifth anniversary as partners. Will they survive the case or will it be their last together?