Holiday Special: Pete is hit in the head by an artifact and wakes up to a life where he was never born. Pete must hunt down and persuade the Warehouse team (none of whom recognize him) to go on this life or death mission with him to vanquish a long dead nemesis from the past to get everyone’s lives back.
The quaint town of geniuses is transformed into animated versions of themselves. Sheriff Carter and Allison Blake are secretly planning the perfect holiday surprise for their kids. But a mysterious kaleidoscopic wave of color crashes over Eureka, leaving the entire town and its inhabitants animated.
When Castle and Beckett wake up in bed, handcuffed together, in a locked room with no memory of how they got there, they must piece together the mystery of where they are and why, all while trying to escape. But as the two of them adjust to being shackled together, what’s the biggest threat they face… the people who abducted them or each other? Meanwhile, Ryan, Esposito and Gates are left to investigate their disappearance in a case where all is not what it seems.
Robin receives bad news and decides to hide it from the gang. Marshall hangs Christmas decorations in his house in the suburbs with some help from his neighbor.
A routine arbitration turns into a battle of wills between Alicia and Louis, but the pair makes an unexpected connection when a personal crisis interrupts the proceedings.
Carrie and Saul identify Walker’s contact in Washington but their target has diplomatic immunity; Brody is approached to run for a disgraced congressman’s seat in the House of Representatives.
Jeff and Shirley bond over foosball. After Annie breaks Abed’s special edition DVD of « The Dark Knight », she covers it up by staging a robbery.
Taylor and Mira must set aside their differences when they encounter a prehistoric enemy; Jim closes in on the mole.
After his attempt to sever ties with Abu Nazir, Brody finds himself reliving his captivity and recommits to his mission; Carrie finds herself in the middle of a public relations nightmare on the heels of the mosque shooting.
An old neighborhood kid returning to town as a internet billionaire gets Phil thinking of what could have been. Jay feels Manny could use some constructive criticism, Cameron is offended when Mitchell questions the authenticity of his colorful childhood stories.