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.

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

With their loved one’s lives in the balance, Harry and Fergus call on all the help they can to try stop an heinous assassin.

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.

The Runaways face off with their parents. But when Jonah arrives unexpectedly with a new game plan, the kids realize they are in over their heads.

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.

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

While CPD tries to take down a drug kingpin, Atwater faces a tough choice.

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

Monk is charged with the murder of the man who killed Trudy, and manages to escape custody in order to figure out what really happened.

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.

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.

When Carter finally comes face-to-face with Reese, he urges her to join forces to help with their latest Person of Interest, a young woman trying to turn her life around.

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.

Cole finds himself on the rebound after Natalie's engagement; Murtaugh worries about the connection between the murder he's investigating and an opportunity for Trish to serve as co-counsel on a high profile lawsuit with Leo Getz.

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.

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.

Buzz stumbles upon a dead body in a hotel bathtub on his first day of duty as a reserve officer, possibly spoiling the unit's Fourth of July plans to go to a Dodgers' game. Rusty needs help to get the password code for Alice's voice mail.

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.

An Irish terrorist comes to Dr. Lightman to find out who killed his wife and daughter seven years ago, which reveals secrets about Lightman's relationship with Dr. Foster and his past job working counter-terrorism for the government.

Questioning a neighbour leads to a revelation about one of the victims. Meanwhile, Reddick begins to investigate the disappearance of Lt. Skinner.

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

Linden and Holder focus their investigation on a student with a sordid past, and a tip from an informant leads Reddick to a shocking discovery.

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.

When Carter finally comes face-to-face with Reese, he urges her to join forces to help with their latest Person of Interest, a young woman trying to turn her life around.

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

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.