A suspected North Korean spy is poisoned and hit by a truck carrying Christmas trees. The team investigates and tries to learn who is smuggling spies into the country. Meanwhile, Deeks and Kensi try to include their mothers in their Christmas plans; and Hetty notices that Granger isn't in a holiday mood.moreless
Callen and Sam are shocked when an old acquaintance they thought had been murdered shows up and asks for their help. Their investigation uncovers a possible breach of America's economic sanctions against Russia.moreless
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.moreless
A suspect in NCIS' murder investigation of two former military contractors puts one of the team in serious peril. Callen gets set up on a blind date.
Masters and Virginia find an excellent way of keeping record of their work but they will need some extra help. Virginia returns to college but things prove not to be so easy. Dr. Haas and Langham discuss their married lives. Also, Scully's sexual impulses are put to the test by Margaret's discovery.moreless
Walden attends a singles mixer for rich people and runs into Bridget. Alan gets worried when they begin talking about getting back together.
The CSIs arrive at their favorite diner only to discover a gruesome crime scene with eight dead victims and a lot of questions.
Wes and Travis stake out the apartment of a novelist suspected of helping in a prison break.
Adam feels left out because Jeff wants to be by himself. Audrey and Jen go to a Bon Jovi concert.
Bert tries to teach Andrew, how to have a one-night stand, but Andrew struggles with not getting his hopes up. Meanwhile, Mike and Janet get help from Diane preparing for Mike's green card interview.moreless
Nick is surprised when his father refuses to do the Christmas festivities in the house, and he decides to find a way to learn why. Physical Phil continues his tradition of pretending to be an architect when his parents come for a visit, which irritates his girlfriend. Eddie freaks out when Janet gives him a very personal Christmas gift. Owen and Alison end up in bed, but their happiness as a couple is soon put to a test.moreless
Robert think he has finally found "the one"—Angela, an international-trade lawyer who's bright, speaks four languages, clearly loves Robert, and seems too good to be true. When Ray sees her do something that would burst the bubble, he has a hard time getting anyone to believe him.moreless