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.
Frankie’s parents, Pat and Tag, invite the Hecks to spend a few days at their house to celebrate Thanksgiving together. But the festivities begin to fall apart quickly when Frankie’s sister, Janet, and her family also join in, and soon the siblings are at each other’s throats over their widely differing parenting techniques. Meanwhile, Mike tries to offer some advice to Axl on how to pick up girls when he witnesses his son trying to impress a pretty mini-mart cashier – and fails miserably; Brick attempts to prove his innocence when he is accused by Janet of damaging her daughter’s expensive toy; and Sue is stoked when Frankie, Pat and Janet invite her to take part in their gossip sessions.
A sniper on a killing spree is terrorizing New York City. With the clock ticking down to the next murder and nothing to go on except a killer with no apparent motive but to instill terror, this could prove the team’s toughest case yet. The hunt is made even more complicated when Beckett begins to experience increasingly strong moments of PTSD – moments she tries hard to hide from Castle and the detectives.