A patient at a mental hospital undergoes impromptu surgery that leaves his brain exposed. William Bell resurfaces during the investigation of the strange circumstances and Olivia finds reason that the leader of the shape-shifters may have something to do with it.
The Dunphy kids are in trouble again, but this time Claire and Phil are threatening to take Christmas away. Gloria and Manny want to incorporate some of their Colombian practices into Jay’s holiday traditions, but he wants to keep it his way. Meanwhile Cameron and Mitchell take Lily to the mall for her first picture with Santa, however this Santa isn’t very jolly.
Mike takes over the responsibility of organizing the Heck family Christmas while Frankie practices for a solo that she is singing at midnight mass. However, she gets jealous when Mike seems to be doing a better job than she ever did. Meanwhile, Frankie and Mike help Brick get over a problem so he can get into the Christmas spirit.
Castle and Beckett uncover that a bullet is missing from the crime scene while investigating what happened when an art dealer was gunned down in his own gallery. However, when it turns out there was a witness to the murder, they need to refresh the man’s memory, only to find out that he suffers from amnesia and can’t even remember who he is.
When a perfect girl finally shows up, the gang tries everything to help Ted, while Marshall takes action when he discovers a letter written by younger himself.
The FBI investigates a spectacular jewelry heist and all the clues point to Neal. Now Peter must figure out if his « partner » is telling the truth or if Neal is pulling a con of his own.
When Senator Perrin makes his stand against the Rossum Corporation, Echo attempts to stop his expose. Adelle, and Topher begin to see what they are up against in the rival of Washington DC.
Echo and Bennett have a shocking meeting as Adelle goes head-to-head with the ruthless head of the DC Dollhouse. Topher sees double when he must involve Victor in his espionage. Perrin finds a surprising witness to testify against the Rossum Corporation, but find he may be living in a house of cards.
Everyone is shocked when a member of the crew is found dead from a gunshot wound. While at first glance it appears to be suicide, the gun is nowhere to be found. The crew is confined to quarters while a search is performed and when the gun shows up in Col. Young’s quarters, he becomes the number one suspect.
Britta dares Jeff to find himself a partner for a double date with Pierce and his new girlfriend. Shirley and Britta help Annie to learn anatomy for a special health fair presentation in school.