Two burglars witness politician Nicholas Samson kill a woman and seek Harry's help. As suspicion grows and evidence surfaces, Harry faces a powerful enemy.

Karolina, Nico, and Molly try to retrieve the Staff of One, but Tina puts up a fight. Karolina grows closer to Jonah while Alex and Livvie share a kiss.

Heartbroken by the sudden death of Dr. Kroger, Monk rushes into homeownership and gets a little more than he bargained for when he hires a very persistent contractor.

Murtaugh realizes his fighting moves aren't as sharp as they used to be when he and Cole investigate the murder of an underground MMA fighter; Trish considers running for public office; Cole and Erica try to keep things casual.

The Machine identifies a teenager whose brother was just murdered, as the next POI. Meanwhile, Finch grows concerned that The Machine might be discovered.

Major Crimes discovers that their latest murder victim was a sociopath who made lots of enemies, which makes finding his killer more difficult, as well as pinning a crime on the killer once they find that person.

Voight and Ruzek lock horns over how to handle the aftermath of the Antonio situation. Meanwhile, a series of violent carjackings turns deadly, and Ruzek must rely on a C.I. he grew up with to help solve the case.

A decorated war hero who is suffering from Post-Traumatic Stress Disorder claims that someone is trying to kill him, and Dr. Lightman is brought in to investigate.

Two burglars witness politician Nicholas Samson kill a woman and seek Harry's help. As suspicion grows and evidence surfaces, Harry faces a powerful enemy.

The Machine identifies a teenager whose brother was just murdered, as the next POI. Meanwhile, Finch grows concerned that The Machine might be discovered.

Heartbroken by the sudden death of Dr. Kroger, Monk rushes into homeownership and gets a little more than he bargained for when he hires a very persistent contractor.

Voight and Ruzek lock horns over how to handle the aftermath of the Antonio situation. Meanwhile, a series of violent carjackings turns deadly, and Ruzek must rely on a C.I. he grew up with to help solve the case.

A decorated war hero who is suffering from Post-Traumatic Stress Disorder claims that someone is trying to kill him, and Dr. Lightman is brought in to investigate.

Murtaugh realizes his fighting moves aren't as sharp as they used to be when he and Cole investigate the murder of an underground MMA fighter; Trish considers running for public office; Cole and Erica try to keep things casual.

Alex, comfortable in Compton, is betrayed. Jonah gives Leslie a mission to retrieve his DNA from the Yorkeses while Catherine exacts vengeance. Molly sneaks out to fight crime.

After Damien's body is burned, Laura needs Harry to clear her of murder. Harry and Fergus investigate a murky family history of whiskey and sabotage.

Brilliant chess grandmaster Patrick Kloster's wife Linda Kloster goes to Monk saying that her husband is planning to murder her, and she wants him caught posthumously.

Two LAPD officers are killed, and Major Crimes needs to find the lone witness to the crime - an El Salvadoran involved in a counterfeiting ring who was being brought in by the officers.

Dr. Lightman allows a wealthy client to shadow him as he tries to find out who critically wounded a Washington, D.C. police officer in an apartment building taken over by drug dealers.

Reese discovers there's more to the story after he infiltrates a smuggling ring to get close to his latest Person of Interest...who may be hiding a secret identity.

When Cole and Murtaugh investigate a case involving a father and daughter (illegally) crossing the Mexican border, they end up uncovering a major issue with California Boarder Patrol. Meanwhile, Trish prepares her campaign for D.A. and must face parts of her past, before they find their way into the media spotlight. Cole also confronts his past when he experiences flashbacks as a result of an injury.

An investigation into the death of a well known district attorney puts the Intelligence Division at odds with a mayoral candidate. Antonio returns to work but doesn't trust his own judgment when an operation goes sideways.

A young woman is thrust into the world of old money and deadly secrets after accepting a nanny job from a handsome widower.

Two LAPD officers are killed, and Major Crimes needs to find the lone witness to the crime - an El Salvadoran involved in a counterfeiting ring who was being brought in by the officers.

Reese discovers there's more to the story after he infiltrates a smuggling ring to get close to his latest Person of Interest...who may be hiding a secret identity.

Dr. Lightman allows a wealthy client to shadow him as he tries to find out who critically wounded a Washington, D.C. police officer in an apartment building taken over by drug dealers.

When Cole and Murtaugh investigate a case involving a father and daughter (illegally) crossing the Mexican border, they end up uncovering a major issue with California Boarder Patrol. Meanwhile, Trish prepares her campaign for D.A. and must face parts of her past, before they find their way into the media spotlight. Cole also confronts his past when he experiences flashbacks as a result of an injury.