Peter struggles to cope with recent events; Olivia searches for an ally; a device that communicates between universes is discovered…

Cal assists Det. Wallowski investigate the murder of the daughter of a terminally ill friend of hers. Meanwhile, Ria is mugged in a rough neighborhood and goes looking for the guy who did it.

Mike begrudgingly invites his brother, Rusty, who is temporarily living in a tent, and his father, Big Mike, who has recently broken his hip, to join him for the annual Heck family Thanksgiving. But when Frankie observes the macho Heck men’s non-communicative nature, she encourages a not-so-receptive Mike to engage them in a real conversation and express their feelings. Meanwhile, Brick is ecstatic when he discovers that Bob is bringing his girlfriend, Linda – the local librarian who loves books as much as Brick does – to Thanksgiving; and Sue wants to start a mother-daughter tradition of baking a pie for the holiday, but ends up getting more sliced up than the crust.

When Ted leaves the bar early to prepare a Thanksgiving feast for his friends, the gang winds up partying all night with The Blitz, an old friend from college who has bad luck. As a result Ted is forced to spend Thanksgiving with Zoey.

When a serial kidnapper “over there” strikes again, the emotional and familiar case hits home for Colonel Broyles, sending a determined Olivia to uncover additional details about the abductions. In the meantime, Olivia fights on and reunites with Henry to enlist his services on an intense and covert mission to return home.

Cal goes head-to-head with a cult-like self-help guru, as he tries to free a wealthy woman from his control. As the investigation progresses, Cal starts playing hard-ball when veiled threats are made towards Emily.

Annie’s favorite pen goes missing, and she suspects that someone in the group took it. Then study room is put on lock down, and Jeff starts conducting the investigation. Troy and Abed are especially anxious to get out of the room in order to make it to the Greendale Puppy Parade in time.

Back “over here,” the Fringe Division investigates a bizarre phenomenon when 15 people up and down the Eastern Seaboard, all suffer retrograde amnesia from listening to their shortwave radios on the same frequency. Much to Walter’s dismay, Peter presses on with piecing together the mass destruction device. Just as alternate Olivia and Peter’s chemistry deepens, the anticipation of Olivia’s return escalates.

Castle and Beckett investigate the murder of an NYC subway worker found shot in Central Park. But, while investigating the murder they uncover the abduction of a young boy as well. The team must determine the motives behind the high stakes kidnapping in order to save the young boy’s life.

When the gang goes to a black tie event at the Natural History Museum, Ted gets introduced to Zoey’s husband, The Captain.