Harry and Fergus take on a disturbing case - a serial killer targeting random victims and leaving a coin in their mouths. Meanwhile, Harry B asks a reluctant Harry to travel the world and Fergus plans to attend college with Lola.

The kids are reeling following last night’s events. As an investigation begins, they discover their parents may have more to hide than they could have imagined.

A convicted murderer put away by Monk is exonerated. Monk must figure out what really happened to keep his remaining shred of confidence.

Cole and Murtaugh try to balance their family lives with their efforts to bust a gang running a lottery scam.

When the Machine produces the social security number of a judge renowned for his tough sentencing, Reese and Finch have the added challenge of investigating a person of interest who wants nothing to do with their brand of vigilante justice.

The body of a dead teenage autistic girl is found in the bed of a registered sex offender's truck, but he claims to be innocent. Meanwhile, Rusty is spooked by the latest development in the Stroh case.

With Voight suspended, Antonio takes charge of Intelligence to deal with overdoses of bad heroin, but Ruzek undermines his authority.

An old friend from Lightman's past comes for help, and gets Lightman involved with a dangerous man being investigated by the FBI. Meanwhile, the rest of the team tries to find the high schooler behind a dangerous and threatening video.

Harry and Fergus take on a disturbing case - a serial killer targeting random victims and leaving a coin in their mouths. Meanwhile, Harry B asks a reluctant Harry to travel the world and Fergus plans to attend college with Lola.

When the Machine produces the social security number of a judge renowned for his tough sentencing, Reese and Finch have the added challenge of investigating a person of interest who wants nothing to do with their brand of vigilante justice.

A convicted murderer put away by Monk is exonerated. Monk must figure out what really happened to keep his remaining shred of confidence.

With Voight suspended, Antonio takes charge of Intelligence to deal with overdoses of bad heroin, but Ruzek undermines his authority.

An old friend from Lightman's past comes for help, and gets Lightman involved with a dangerous man being investigated by the FBI. Meanwhile, the rest of the team tries to find the high schooler behind a dangerous and threatening video.

Cole and Murtaugh try to balance their family lives with their efforts to bust a gang running a lottery scam.

The parents try to find a solution to PRIDE’s problem, and the kids grapple with a new discovery that yields more questions than answers.

Harry and Fergus travel to the convent of a silent order of nuns after an old friend asks Harry to investigate a suspicious suicide, believing foul play is afoot. Elsewhere, a familiar face provides a very welcome surprise.

Monk obsesses about a woman he bumped into on the street and the resulting insomnia causes him to witness a crime that apparently didn't occur.

Sanchez becomes a person of interest in a murder investigation when his mother's home caregiver is found dead hours after getting in a fight with Sanchez.

Agent Reynolds refuses to testify in an undercover case from his past because it may reveal that he killed a man during the operation, but Dr. Lightman tries to come to his defense and keep him out of harm's way.

Reese finds himself captivated by their latest Person of Interest, a beautiful, shrewd and remarkably resourceful woman adept at problem solving.

Cole and Murtaugh look back on past mistakes as Leo Getz returns as the attorney on their latest case.

Intelligence hunts down the man responsible for the high-rise fire and the case gets personal for Halstead.

Sarah copes with the consequences of past mistakes; Holder wrestles personal demons; Seward is truthful.

Sanchez becomes a person of interest in a murder investigation when his mother's home caregiver is found dead hours after getting in a fight with Sanchez.

Reese finds himself captivated by their latest Person of Interest, a beautiful, shrewd and remarkably resourceful woman adept at problem solving.

Agent Reynolds refuses to testify in an undercover case from his past because it may reveal that he killed a man during the operation, but Dr. Lightman tries to come to his defense and keep him out of harm's way.

Cole and Murtaugh look back on past mistakes as Leo Getz returns as the attorney on their latest case.