Helen Coxe

As Detective Carter deals with the fallout from her recent encounter with Reese and Finch, the Machine ups the ante for the duo by giving them four Social Security numbers instead of one.

Kevin encounters unexpected holiday surprises, while Tom and Christine run into more trouble on the road.

Sherlock resumes his hunt for Moriarty when Sebastian Moran reveals that a man who was thought to be dead from a heart attack was actually on the list of intended victims from Moriarty. Vinnie Jones returns as the sinister "M." F. Murray Abraham guest stars as "The Actuary," a devious hitman.

Detectives suspect the drug-addicted son of a murdered suburban couple, but when another suspect emerges, Deakins urges Logan and Barek to drop the case.

Logan and Falacci investigate the shooting of the wife of a corrupt judge.

After voicing her opinion in a company staff meeting, Martina makes a good impression on her boss, Donovan Stark, who assigns her third chair on a murder case involving a student accused of killing her professor. Meanwhile, at home, Martina's niece comes to her to help convince her mother to allow her to get a tattoo.