During a guided tour, a heckler's death reveals a literary-themed murder plot that Harry and Fergus investigate. Meanwhile, Diyu succeeds in an assassination despite FBI intervention and plans their next hit at Vicky's wedding.

PRIDE tries desperately to clean up their latest mess without involving Jonah. But can they handle this on their own?

Natalie is frantic, to the detriment of Stottlemeyer's new car, when it appears a mad man is targeting his victims based solely on their name - Julie Teeger.

Cole needs to talk to Natalie about their relationship. Murtaugh makes an unlikely friend.

As Detective Carter deals with the fallout from her recent encounter with Reese and Finch, the Machine ups the ante for the duo by giving them four Social Security numbers instead of one.

A dead body comes out of the trunk of a crashed car at the end of a police chase, and the case hits too close to home for Sanchez. Rusty decides to tackle an unsolved case for his journalism class.

When an alderman's wife is beaten to death, Brennan pressures Voight to close the case; Upton shares a dark time from her past to get a confession.

A frustrated farmer with a bomb drives his tractor to Washington and demands to talk to the president, and Cal is brought in to find out who's really calling the shots.

During a guided tour, a heckler's death reveals a literary-themed murder plot that Harry and Fergus investigate. Meanwhile, Diyu succeeds in an assassination despite FBI intervention and plans their next hit at Vicky's wedding.

As Detective Carter deals with the fallout from her recent encounter with Reese and Finch, the Machine ups the ante for the duo by giving them four Social Security numbers instead of one.

Natalie is frantic, to the detriment of Stottlemeyer's new car, when it appears a mad man is targeting his victims based solely on their name - Julie Teeger.

When an alderman's wife is beaten to death, Brennan pressures Voight to close the case; Upton shares a dark time from her past to get a confession.

A frustrated farmer with a bomb drives his tractor to Washington and demands to talk to the president, and Cal is brought in to find out who's really calling the shots.

Cole needs to talk to Natalie about their relationship. Murtaugh makes an unlikely friend.

The Runaways are feeling more fractured than ever when Molly arrives with a devastating message from her parents. Now the kids have to stop their parents before it’s too late.

At Vicky and Cormac’s wedding, Harry and Fergus interrupt an assassin’s kill and unwittingly bring about drastic consequences.

During an investigation of murders at a junk yard, Monk takes up painting and finds a patron.

A supermodel is killed and the suspects include her MMA fighter ex-boyfriend and an obsessed photographer who put a virus on her computer. Meanwhile, Rusty's interview in the Jane Doe case could jeopardize the people's case.

Dr. Lightman is convinced that one of his former protégé's students is a sociopath connected to a woman's disappearance, but everyone else is skeptical. Meanwhile, Torres and Loker help a high school teacher who thinks he saw an UFO.

Reese works the computer while Finch does the legwork with their latest target, a building superintendant who keeps too close an eye on his tenants. Meanwhile, Detective Carter may finally get a glimpse into one of their cases, so she can decide whether she wants to join the team.

While Cole gets into the holiday spirit for his first Christmas with Maya, Murtaugh hopes he can convince RJ to come back home from Costa Rica for the holidays. At the precinct, Cole and Murtaugh are saddled with a complicated burglary and home invasion case. Meanwhile, Avery's holidays are a bit blue, and Bailey is still trying to figure out her new partner.

Voight tells Halstead to remain impartial when the leader of a local mosque becomes a suspect in the bombing of an Army recruitment center.

Reddick digs deeper into Skinner's disappearance, while Linden and Holder try to keep their crime a secret and their investigation from going cold.

A supermodel is killed and the suspects include her MMA fighter ex-boyfriend and an obsessed photographer who put a virus on her computer. Meanwhile, Rusty's interview in the Jane Doe case could jeopardize the people's case.

Reese works the computer while Finch does the legwork with their latest target, a building superintendant who keeps too close an eye on his tenants. Meanwhile, Detective Carter may finally get a glimpse into one of their cases, so she can decide whether she wants to join the team.

Dr. Lightman is convinced that one of his former protégé's students is a sociopath connected to a woman's disappearance, but everyone else is skeptical. Meanwhile, Torres and Loker help a high school teacher who thinks he saw an UFO.

While Cole gets into the holiday spirit for his first Christmas with Maya, Murtaugh hopes he can convince RJ to come back home from Costa Rica for the holidays. At the precinct, Cole and Murtaugh are saddled with a complicated burglary and home invasion case. Meanwhile, Avery's holidays are a bit blue, and Bailey is still trying to figure out her new partner.