Ted is reluctant to break things off with his unstable girlfriend (Abby Elliot); Robin holds Marvin for the first time.
An anonymous source provides advanced details on an important story; the staff cuts its anniversary party short.
The NCIS team investigates a petty officer's murder that was livestreamed on a popular gaming app; Gibbs watches his 11-year-old neighbor when his mom must leave on a last-minute trip.
The holiday spirit is alive, well, and wildly different for each member of the Short family.