Katrina Norman

When shooting victims are found in the Los Angeles area with possible links to criminal activity, the BAU searches for a vigilante UnSub.

It's holiday time at Hollywood Arts and the kids have to find the perfect Secret Santa gifts for each other because whoever gives the worst gift has to go door-to-door yodeling with Sikowitz.

A thrift store donation turns gruesome when a dead body is found in a box; meanwhile, Langston's wife pays a surprise visit to the crime lab. (TV-14)

While Alexis (guest star Nicollette Sheridan) and Blake (Grant Show) continue to battle, Alexis enlists in a surprising ally, Jeff Colby (Sam Adegoke). With her loyalties torn, Fallon (Elizabeth Gillies) must decide if she helps save the company or come to the aid of Culhane's (Robert C. Riley) family. Nathalie Kelley, James Mackay, Rafael de la Fuente and Alan Dale also star.