Brett Weinstock

A series of murders in San Francisco bearing the tell-tale signs of the infamous Zodiac Killer have the BAU wondering if the notorious serial killer has returned. Also, Reid ponders if he should be doing more with his genius abilities.

Nick (David Giuntoli) and Hank (Russell Hornsby) are called to investigate a bizarre string of home invasions that lead to an even stranger Wesen phenomena. Monroe (Silas Weir Mitchell) has a very special Christmas surprise in store for Rosalee (Bree Turner). Meanwhile, Truble (guest star Jacqueline Toboni) comes to a life changing realization that will affect everyone. Bitsie Tulloch, Sasha Roiz and Reggie Lee also star.

Leonard is forced to confront some longstanding insecurities when his new high-stakes case leads him to question what is right and what is wrong. Sandra goes head-to-head with Seth who files charges against a daring comedian accused of threatening a U.S. president's life; and Jay defends a tennis player accused of intentionally throwing a match to help his coach win a bet he placed against him.