A mysterious benefactor gives an ex-government operative a chance at redemption. All they have is the name of a person who will be involved in a violent crime, whether as victim or perpetrator, they don't know, but will find out.

Reese and Finch are given the number of a teenager killed two years ago, making Reese question the sources fallibility.

The latest number is an ex-soldier who's now part of a gang that specialize in robberies. Mr. Reese goes undercover inside the gang.

Reese and Finch surveil their latest POI, Dr. Megan Tillman, while she's on call and after hours to unravel the threat surrounding the promising young physician.

When the Machine produces the number of a judge renowned for his tough sentencing, Reese and Finch have the added challenge of an uncooperative POI who has too many enemies.

Mr. Reese goes undercover as a chauffeur to get closer to the latest number.

The Machine identifies a school teacher who witnessed a mob hit as their next POI and Reese and Finch rush to save his life.

When Reese and Finch discover that their latest POI has connections to Cold War Soviet espionage circles, they quickly learn how covert ops were handled in a world before The Machine.

Reese and Finch's game of cat and mouse with Detective Carter becomes infinitely more complicated when The Machine declares that she is their newest POI.

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.

With Reese still recovering from his injury, Finch does the legwork with their latest POI, a building super who keeps too close an eye on his tenants.

When Carter finally comes face-to-face with Reese, he urges her to join forces to help with their latest POI, a scrappy young woman from the wrong side of the tracks who turned her life around and became a lawyer.

Finch and Reese run surveillance on a man who's been unemployed for eight months without his family knowing. Angry that he's been fired, he may pose a threat to society.

The Machine identifies Darren, a teenager whose brother was just murdered, as the next POI. Meanwhile, Finch is growing concerned that the son of his former business partner is dangerously close to finding out about The Machine.

Reese discovers there's more to the story after he infiltrates a smuggling ring to get close to his latest POI.

The Machine leads Reese and Finch to Wall Street when a sharp young trader at a major investment bank becomes embroiled in a multi-million dollar financial scam.

When Moretti gets released from prison, Carter and Mr. Reese team up to protect him from Elias. Meanwhile, Finch's new number belongs to a six month old baby girl.

Finch and Mr. Reese are going after a person who seems to be leading a double life. However, they soon realize there are 2 people with the same social security number; one of whom is in danger and one who's an impostor.

Elias is finally ready to eliminate the dons and become the leader of the underground.

In 2012, Mr. Reese goes undercover as an armored car security guard to prevent a robbery. In 2010, CIA plan to eliminate two of their best agents.

Finch gives Reese the day off ostensibly as a favor but really because the new number is too close to John. He finds out anyway, leading to the question of how far he will go to protect.

Finch and Mr. Reese are tailing a spy working for the NSA. As he gets too close to finding out about the Machine, the Government are out to get him.

Reese is trapped next to a person of interest in a part of the city extremely controlled and needs the help of Finch, Fusco and Carter.

Mr. Reese breaks Finch's code of communicating with the Machine in order to save the new number, Leon, who stole money from some Aryan outlaws. He then convinces the Machine to help him find Finch.

Detective Carter and Mr. Reese go to Texas to look into Root's past. Root shows to Finch that the people who bought his Machine are evil. Mr. Reese finally finds Finch.

Mr. Reese becomes the new bodyguard of the daughter of a Brazilian diplomat who parties with the wrong type of people. Finch finds it hard to readjust to society after his kidnapping.

Mr. Reese and Finch try to protect a man involved in organized crime that has a bounty on him.

The FBI are getting closer to the head of HR. Mr. Reese tries to prevent a young journalist that likes taking risks from being killed. To avoid getting media attention, Mr. Reese starts dating her. Fusco is playing double.

John and Zoe go deep undercover as husband and wife to get close to a person who's been using a dead guy's identity for the past 15 years. In a flashback Finch first meets Grace Hendricks.

Leon is trapped for his own protection. A medical doctor faces a difficult decision. Detective Carter encounters agent Snow.

Mr. Reese and Mr. Finch try to stop a rich married couple from killing each other.

Finch and Mr. Reese try to protect a taxi driver that is being chased by the Estonian mafia. HR try to make a deal with Elias.

While the FBI refocuses their efforts to catch "The Man in the Suit," Reese's latest POI becomes a personal quest after he learns that she's the sister of a soldier who was killed in action.

Finch goes undercover as a maths teacher to get close to the new Number, a troubled high school student, with a lot of secrets.

Finch and Carter are trying to get Reese out of Riker's, where he is still being kept prisoner by Donnelly. Meanwhile, Fusco is working alone on the next number.

Reese finds out that being saved from prosecution by Stanton means having a bomb strapped to his chest while he and Snow do her biding.

A tech billionaire's erratic behavior makes it very hard for Mr Reese to protect him when his number comes up.

Finch and Reese go undercover in a hotel to protect a cleaning woman who is the apparent target of Serbian killers. Meanwhile, Carter begins the process of joining the FBI and someone from their past unexpectedly returns.

Sam Shaw and her associate Michael Cole receive the Relevant numbers from the Machine.

The Machine suddenly provides six numbers, one of whom has a place on remote Owen Island. Because of a tropical storm Finch and Reese are trapped there with eight others, and one is them is methodically killing the others, one by one.

After saving Leon Tao yet again, Reese goes to Atlantic City to watch over a retiree who's losing a fortune in the casino. HR smears Szymanski so that he can't testify at a Russian mob trial and Carter risks her life trying to clear him.

Finch goes undercover at a tech company to watch a rising VP. The company appears to be riddled with agents who are a front for something more sinister. Shaw reappears and takes an interest in Root. HR decides to rub out an informant.

A respected doctor is poisoned with Polonium and has just 24 hours to help Reese find his killer. Carter, grieving over the death of Cal Beecher, helps Fusco when HR turns Internal Affairs against him.

They wait ten days for a new number due to a system virus, suspecting Root is the problem. It's for Ernest Thornhill, who isn't who, or what, he is supposed to be. At stake is The Machine - will it remain with Finch or end up with Decima?

Reese and Finch team up with surprising allies in a race to save The Machine from Root and the mysterious international organization, Decima, who have both re-emerged with dangerous agendas.

It's Fleet Week in New York City, making the hunt for one Naval Officer among a sea of sailors even more difficult for Reese, Finch and Shaw.

The head of an Internet company ostensibly for finding lost loved ones is really a front for selling personal info. Carter has to train a new cop while she looks for Beecher's killer and a new vigilante named Collier makes his appearance.

The team suspects the latest number to be a potential stalker/ killer until he's nearly shot on the street. Root plots her escape from the institution and gives her psychiatrist a big surprise.

The next number the machine dispenses is for Vanessa Watkins, a hard-nosed prosecuting attorney who, when Finch and Reese first meet her, has just reported her husband, Jeremy Watkins, missing from their yacht. While Vanessa has put away many a criminal over her storied career, Jeremy has let many go as a flashy and high-priced defense attorney. As her number came in after the report of him missing, they know Jeremy's presumed death is not the reason for the number, yet they don't know if Vanessa is the target or the perpetrator. They learn that the lead investigator on the case of Jeremy's death, Detective Cameron, is looking at her for her husband's murder as all evidence found thus far implicates her. Cameron's main problem?: he doesn't have a body, and thus needs Vanessa to confess to make a conviction stick, which she may or may not know. They will also learn that Cameron has a personal vendetta against her, which places a major obstacle in tracking her as she tries to elude Cameron. As Finch and the team wade through the story of the complicated lives of Jeremy and Vanessa - including their unlikely personal coupling - they find that Vanessa knows her law and is resourceful and strategic in her every surprising move. They may not learn if she is the target or the perpetrator without getting the story directly from her. Even then, as she is a lawyer who knows how to spin, they have to act the judge and jury in their own court of opinion in evaluating her story. Meanwhile, as Carter assists them on this case, she finds that she has to be careful around her new rookie partner, Laskey. She doesn't yet know how careful she truly has to be.

Shaw is tasked with staying close to a 10-year-old girl identified by The Machine. Meanwhile, Carter's continues her mission to take down HR.

Root reappears and kidnaps Shaw. Finch helps an estate investigator who looking into the death of his step brother. A new vigilante group (Vigilance) makes it presence known. Carter's young partner has his loyalty to HR tested.

A hypnotherapist, who's really a con man, pumps his patients for personal information while they are hypnotized. One of his patients is an antique dealer who launders money for HR.

Finch receives 38 numbers at once from the Machine. He discovers they are connected to an unknown player who is inciting an all-out war between HR and the Russian mob.

Danger closes in when the epic battle to bring the criminal organization HR to justice reaches new heights. And when the Machine suddenly gives out Reese's number, the POI team faces their greatest threat yet.

Reese tries to honor Carter's memory by solving a cold case she was unable to.

Finch receives 38 numbers at once from the Machine. He discovers they are connected to an unknown player who is inciting an all-out war between HR and the Russian mob.

Danger closes in when the epic battle to bring the criminal organization HR to justice reaches new heights. And when the Machine suddenly gives out Reese's number, the POI team faces their greatest threat yet.

A hypnotherapist, who's really a con man, pumps his patients for personal information while they are hypnotized. One of his patients is an antique dealer who launders money for HR.

Finch and Carter are trying to get Reese out of Riker's, where he is still being kept prisoner by Donnelly. Meanwhile, Fusco is working alone on the next number.

Reese tries to honor Carter's memory by solving a cold case she was unable to.

The next number the machine dispenses is for Vanessa Watkins, a hard-nosed prosecuting attorney who, when Finch and Reese first meet her, has just reported her husband, Jeremy Watkins, missing from their yacht. While Vanessa has put away many a criminal over her storied career, Jeremy has let many go as a flashy and high-priced defense attorney. As her number came in after the report of him missing, they know Jeremy's presumed death is not the reason for the number, yet they don't know if Vanessa is the target or the perpetrator. They learn that the lead investigator on the case of Jeremy's death, Detective Cameron, is looking at her for her husband's murder as all evidence found thus far implicates her. Cameron's main problem?: he doesn't have a body, and thus needs Vanessa to confess to make a conviction stick, which she may or may not know. They will also learn that Cameron has a personal vendetta against her, which places a major obstacle in tracking her as she tries to elude Cameron. As Finch and the team wade through the story of the complicated lives of Jeremy and Vanessa - including their unlikely personal coupling - they find that Vanessa knows her law and is resourceful and strategic in her every surprising move. They may not learn if she is the target or the perpetrator without getting the story directly from her. Even then, as she is a lawyer who knows how to spin, they have to act the judge and jury in their own court of opinion in evaluating her story. Meanwhile, as Carter assists them on this case, she finds that she has to be careful around her new rookie partner, Laskey. She doesn't yet know how careful she truly has to be.

Reese and Finch's game of cat and mouse with Detective Carter becomes infinitely more complicated when The Machine declares that she is their newest POI.

A respected doctor is poisoned with Polonium and has just 24 hours to help Reese find his killer. Carter, grieving over the death of Cal Beecher, helps Fusco when HR turns Internal Affairs against him.

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.

The Machine suddenly provides six numbers, one of whom has a place on remote Owen Island. Because of a tropical storm Finch and Reese are trapped there with eight others, and one is them is methodically killing the others, one by one.