Person of Interest - Episode Guide

John Reese is a former CIA operative living off the grid in NYC. When Reese is hauled into NYPD's 8th Precinct for a skirmish on the subway, he's bailed out by a man he doesn't know: Mr. Finch, a mysterious billionaire. Finch offers Reese a choice: stay on the streets and drink himself to death -- or join him in his mission to stop violent crimes before they happen. Finch has access to a secret source of information, one that identifies people who are about to be involved in violent crimes. There's just one catch: he doesn't know if these people will be the victims or the perpetrators. Skeptical but intrigued, Reese agrees to help. Together, Reese and Finch work to discover what danger is about to befall Assistant District Attorney Diane Hansen. Their actions garner the unwanted attention of NYPD homicide detective Carter -- a dedicated veteran cop who's not fond of vigilantes -- and Detective Fusco, a precinct detective who stands in the way of Reese's plans.

Finch gives Reese another social security number from the machine -- another chance to stop something terrible from happening. But there's something strange about this number. It belongs to Theresa Whitaker -- a teenage girl who was murdered two years ago. Finch claims his machine is never wrong. So why is it pointing them toward someone that it's too late to save? What does the machine know that they don't? With Detective Carter still hunting them down, Reese and Finch begin to find out what really happened to Theresa -- and discover that they might still have a chance to be there in time.

Reese goes undercover to find the threat surrounding the next person on Finch's list: a young army veteran named Joey Durban. Fresh out of the service, Joey seems to be adjusting well to life back home. He has a good job, a beautiful girlfriend, and his whole life ahead of him. But Reese and Finch soon discover that even though Joey's off the battlefield, he's still putting himself in the line of fire. It seems Joey and his army buddies are using the skills they learned in combat to commit daring heists in New York. According to Finch's machine, Joey's about to kill or be killed -- so Reese infiltrates the group to find out which. With Detective Carter hot on his trail, Reese is closer to getting captured than ever before as he goes on a high-risk mission that puts his life -- and Finch's -- in danger.

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

Reese is captivated by their newest POI - a beautiful, shrewd and remarkably resourceful woman.

Finch gets the number belonging to Charlie Burton, a high school history teacher in Brighton Beach, Brooklyn, and an unlucky witness to a Russian mafia murder. Reese, with no time to spare, rushes to Charlie's side and whisks him out of danger just as the mob descends on his apartment to silence him for good. But they can't shake the Russians that easily. In hot pursuit, the shooters chase them into the infamous Double B High Rises -- a city housing project that has fallen into disrepair and is now home to thugs and illegal enterprises. Reese must find a way to escape the Double B's with Charlie and get him safely across the river into Carter's hands so that Charlie can testify to what he saw and bring justice to the victim of the murder. But the mafia is dead set on killing Charlie and will stop at nothing to make sure that Charlie doesn't make it out of the Double B's alive. And when Reese loses contact with Finch, Finch must look to Detective Fusco for help.

Reese and Finch receive the number for Wallace Negel -- a mysterious man who hasn't had a single electronic transaction in his name since 1989. But as they dig for more details, they begin to suspect that Negel is not who he seems. Reese knows a cover identity when he sees one. This man is a spy. When bodies start to turn up, Reese and Finch need to figure out how they are connected to this agent and why he has returned to New York City after so much time. In this game of spy vs. spy, the old school operator matches his spycraft against Reese and Finch's neo-technology. We also learn more about Reese's early days in the CIA and his relationship to a mysterious woman named Stanton.

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.

­The machine gives Finch 4 numbers almost simultaneously, which means the POI's are probably connected. When they find the first number murdered, Reese enlists Finch and Fusco to help keep the others safe. Unfortunately Finch isn't able to get there in time for the second victim. Reese figures out that the remaining two numbers are foster sisters and manages to rescue them from an attempt on their life. Finch determines that all four seemingly unconnected people met at the scene of a car accident and they did something to make them targets.

Reese is confined to a wheelchair recovering from his gunshot wound, but Finch sets him up in an apartment where he's to keep an eye on the Super, who is their latest POI. Also, Finch approaches Carter and gives her a POI to show her what they do.

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.

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Reese and Finch's latest POI is a down-on-his-luck man who may have reached his breaking point. As the case evolves, the duo calls upon a former POI for help, the resourceful and well-connected Zoe.

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 infiltrates a group that specializes in couriering contraband in order to get close to their POI, the #2 in the operation. He's surprised to learn that his POI is an NYPD detective in deep cover.

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 The Machine spits out the number of a 6-month-old baby, Reese and Finch turn into overly protective parents - with an arsenal at their disposal. Meanwhile, when Elias resurfaces, Detective Carter begins to question her new allegiance with Reese and Finch.

Finch and Reese are stymied to find their most recent POI is actually two different people. One is a beautiful woman who is an art dealer who is worried because she thinks someone is following her. The other is a man who was badly beaten and seems to be running an MDMA factory.

When The Machine spits out five numbers, naming the Don of each of New York's crime families, Reese and Finch suspect Elias is planning to eliminate his competition.

The Machine's latest mark puts Reese undercover as part of an armored truck crew, a case that brings back memories of his last CIA mission and painful decisions he was forced to make.

It's Reese's birthday, and Finch gifts him with a day off - especially when he realizes that The Machine's latest number is sure to revive painful memories.

The newest POI's curiosity could spell his doom when he finds himself embroiled in a dark government conspiracy - one that Finch is all too familiar with. Meanwhile, Reese uncovers something revealing about Finch's past.

When a psychologist's number comes up, Reese must protect her from one of her patients while eluding capture by the FBI, who are closing in fast. Meanwhile, Finch receives an unwelcome visit from an old acquaintance.

With Finch missing - kidnapped by his hacker nemesis, Root, in last season's finale cliffhanger - Reese enlists Detectives Carter and Fusco to get his friend back.

The Machine delivers the number of a cold case that leads Reese ever closer to catching up with Finch and his kidnapper, Root.

With Finch back in the Library, Reese returns to field work, only to face his toughest case yet - protecting the privileged daughter of a Brazilian diplomat.

When The Machine gives them the number of a mob enforcer whose life becomes endangered, Reese and Finch must decide whether to intervene or allow karma to balance the scales of justice. Meanwhile, Finch seeks aid from an unlikely source.

Reese must protect an investigative journalist through surreptitious means to avoid becoming part of her story.

Reese goes undercover in an idyllic neighborhood when The Machine's latest number sends him to the suburbs.

The Machine gives Finch and Reese the number of a brilliant surgeon, but they soon discover that a resourceful third party has raised the stakes for this POI, forcing them to turn to an unlikely source for help.

The team is spread thin when a husband and wife's numbers both come up.

Finch and Reese's surveillance skills are pushed to the limit when a New York City cab driver's number comes up and any one of his passengers could be involved in the impending crime.

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 high school substitute teacher to protect a teen genius POI as Carter undertakes a dangerous mission to stop the FBI from determining that an imprisoned Reese is the "Man In a Suit".

While Carter engages in mental warfare with the FBI to help Reese evade Agent Donnelly's narrowing focus, Reese crosses paths with foes both old and new. Meanwhile, Det. Fusco is forced to fly solo to help the team's newest POI: supermodel Karolina Kurkova.

Reese is abducted by an old acquaintance planning a massive act of cyber-warfare that could lead to Reese's death.

Reese and Finch meet their match in a tech billionaire POI whose curiosity and limitless resources threaten to expose their identities and sabotage their efforts to save his life.

Reese and Finch race to save a hotel maid's life but find themselves surrounded by more suspects than they may be able to eliminate when they realize any guest or staff member could be her potential killer. Meanwhile, Detective Carter weighs a major offer from the FBI.

A lethal and sexy government operative who tracks and stops terrorist threats before they occur finds herself on the run - and the new focus of Reese and Finch's attention. However, their pursuit proves to be their most formidable when they discover that her remarkable skillset equals their own.

After The Machine gives Reese and Finch six numbers at once, their search for clues leads them to a coastal town where they are forced to ride out a storm with a group of locals in a police station. However, as the weather rages outside, a sinister situation arises inside when they realize there is an unidentified killer hiding among them.

When an elderly gambler's number comes up, Reese and Finch head to Atlantic City to delve beneath the surface of their POI's seemingly ordinary life for answers. In New York, Carter's crusade to clear a fellow detective's name brings her perilously close to discovering the remaining HR faction within the department.

When the number of a leading tech executive comes up, Finch infiltrates her corporation to gather intel but can't determine whether she is working in her company's best interest or planning to destroy it from the inside. Meanwhile, Carter continues to question Detective Beecher's integrity after he provides incriminating information about a fellow detective.

When a luminary in the world of medicine is poisoned, Reese and Finch have just 24 hours to determine the deadly toxin he was given and find the person behind the attack. Meanwhile, Detective Fusco's past corruption catches up with him when an informant gives the Internal Affairs Bureau the crucial information they need to send him to prison.

Reese and Finch realize that a virus has rendered The Machine erratic, causing it to issue numbers irregularly. As they race against the viral countdown, the team searches for a tech millionaire so elusive no one has ever seen him. Also, Detective Carter's mission to bring Cal Beecher's murderer to justice lands her squarely within the sights of the HR criminal organization.

Reese & 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. As the POI team faces off against enemies old and new, the nature of Finch's relationship with former partner Nathan Ingram is revealed along with his original motivation for wanting to save The Machine's irrelevant numbers. Meanwhile, in her mission to bring Cal Beecher's murderer to justice, Detective Carter finds herself up against the criminal organization known as HR.

The Machine, now completely self-governed with its whereabouts unknown, resumes giving Finch its "irrelevant" numbers for people in danger, which include a U.S. naval officer in town for Fleet Week. However, with so many sailors flooding the streets of New York City, finding the officer in time presents an even bigger challenge for Reese and Shaw. Meanwhile, Carter has been demoted to a patrol officer as a result of her being set up by the corrupt police crime organization HR, and sets a plan in motion to eradicate them for good. Also, Root tests the boundaries of her new asylum surroundings.

The number comes up for an Internet entrepreneur in the business of eliminating people's privacy, but finds his own being rapidly stripped away. As his life spirals out of control, Reese tries to protect him while Finch calls on Shaw, Carter and Fusco for help finding whoever is after him. Meanwhile, Carter finds herself unexpectedly paired with new rookie partner, Mike Laskey.

Reese and Finch enlist the help of Carter, Shaw and Zoe Morgan, who use their feminine wiles to bait a chameleon playboy who is either a predator or someone else's imminent prey. Meanwhile, The Machine helps Root to plot an escape from her psych ward confinement before a dangerous enemy can track her down.

The team gets the number of a prominent New York lawyer and has to determine whether she orchestrated the death of her recently murdered husband, or if she is being framed. Meanwhile, Carter faces an issue with her new partner, Laskey, after he spots her with Reese, aka "The Man in the Suit".

When Shaw is tasked to stay close to a 10-year-old identified by The Machine, she grudgingly develops respect for the young girl's skills in surveillance and realizes it could be the very reason why her number has come up. Meanwhile, Carter's mission to bring the crime organization HR to justice risks exposure.

Freed from her psych ward confinement, Root receives a directive from The Machine that requires Shaw's assistance - by any means necessary - and takes extreme measures to gain her compliance. Also, Reese and Finch look for clues as to why a mild-mannered estate investigator's number has come up.

The number comes up of a hypnotherapist whose life, upon investigation by the POI team, suggests he is more than just a master of the mind. Meanwhile, Carter tracks an antiquities dealer whose business is connected to the crime organization HR.

The POI team's war with HR nears a boiling point when 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 the crime organization and the Russian mob. Meanwhile, a window into Carter's past is seen through flashbacks with her son's father.

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

As the POI team seeks justice for Carter's murder, Finch realizes one of his team members may go one step too far in order to end the war with HR. Also, The Machine gives out the number for NYPD Officer Patrick Simmons, one of the crime organization's key players.

Flashbacks to Finch's adolescence provide insight into his creation of The Machine. Also, the team receives the number of an already dying man, and Reese leaves the POI team behind in the aftermath of the war with the crime organization, HR.

Multiple enemies converge on the POI team as they protect a dying man with a connection to Finch's past whose number has come up. They struggle to keep their enemies at bay without Reese, who has left the team and their mission behind following the tragic war with HR. However, being down one man could have catastrophic repercussions for the team.

Reese boards an international flight in an attempt to put the team and the past behind him, but is angered when he realizes his travel plans have been manipulated.

Reese rejoins Finch in New York, but when the team receives the number of a highly skilled antiquities thief, a surprising turn of events finds them planning a heist which could land them all in jail.

Finch goes undercover in an emergency call center to protect a 911 operator, but it soon becomes clear that the threat reaches further than the team could have anticipated.

The secrets of Finch's operation before he enlisted Reese are revealed, including shocking ties to present-day events.

The Machine assigns Root to seek out a janitor with a mysterious past, but when her very presence puts his life in danger, Finch also receives his number.

Finch and Reese must delve into the murky waters of international politics when they are given the number of a former government contractor who is stalking a UN diplomat. Also, an enemy attempts to gain an upper hand on Root.

Reese and Shaw pose as alumni at a high school reunion in order to keep eyes on the latest POI. Meanwhile, Finch and Fusco travel to Washington, D.C., to investigate the motivations behind Vigilance's latest attack.

Reese poses as a Secret Service agent to get close to the latest POI, a U.S. congressman who may hold the key to derailing Decima's plans to bring a second Machine online.

As Decima uses Samaritan's feeds to hunt Reese and Shaw, Greer exploits Finch's greatest weakness in an attempt to lure him out of hiding: his love for his former fiancée, Grace Hendricks.

When an unknown entity prevents The Machine from seeing the full picture of an impending catastrophic event, it sends the team five separate numbers to help them piece together the bigger picture. Meanwhile, Root's team of hackers arrives in New York.

The team takes desperate actions in its race to prevent the malevolent AI program Samaritan from coming online and making them its first targets. Meanwhile, the months-long battle with the anti-surveillance terrorist group Vigilance comes to a shocking conclusion.

Forced to take on new identities created by Root, the team tries to adapt to their new lives. However, some find it hard to ignore The Machine's numbers, which puts them all at risk of being detected by Samaritan.

Although Finch insists that he no longer wishes to help with new numbers, his interest is piqued when Reese learns that the newest POI is a brilliant college student engaged in a mysterious, life-and-death scavenger hunt.

Finch recruits Fusco to stick close to the latest POI, a professional "wingman," but learning how to approach women soon becomes the least of his worries. Meanwhile, Reese must find a way to play by the rules at his new day job as The Machine sends Finch and Root on a mysterious errand,.

Reese's cover job as a detective at the NYPD becomes complicated when the young brother and sister he's protecting become targets of a gang investigation.

Finch is suspicious when a gifted political pollster's number comes up at the same time that his typically ironclad predictions go wrong, and believes that the two events are linked. Meanwhile, Reese is sidelined by a direct order from Captain Moreno.

Reese, Shaw and Fusco must protect a unassuming office worker who stumbles into a dangerous conspiracy while moonlighting as fake detective. Meanwhile, Finch travels to Hong Kong as part of his academic cover identity.

Shaw joins a team of international thieves in order to keep tabs on the latest POI, but an unexpected turn of events puts her in danger of being detected by Samaritan. Also, Finch and Root undertake a dangerous sabotage mission.

Reese volunteers as an NYPD police academy instructor in order to keep an eye on a talented young officer whose suspicious actions make him question her motives. Meanwhile, Martine - armed with information from Samaritan - hunts a member of the team.

Reese and Finch are caught in a power struggle for control of the city's gangs when Elias is targeted by Dominic, the ambitious leader of the Brotherhood. Meanwhile, Root and Shaw disagree over how to handle a new threat from Samaritan.

Samaritan shows its power by erasing crime from the city for a day in an attempt to force The Machine out of hiding.

Samaritan launches a cyber-attack on the stock exchange, leaving the team with no choice but to embark on a possible suicide mission in a desperate attempt to stop a global economic catastrophe.

Control, who oversees the handling of relevant numbers for the government, begins to question the methods and intentions of the Samaritan program. Also, alarming news reports of a pair of vigilantes rampaging through the Northeast begin to surface.

Reese and Root's hunt for Shaw takes them to a small town in upstate New York where it becomes apparent that not everything is as idyllic as it seems. Also, Fusco teams with a former POI to tackle the newest number.

When the Machine arranges for Finch to sit on the jury of a murder trial, he begins to suspect that a fellow juror is set to rig the proceedings. Meanwhile, Reese begins to open up to the department's therapist.

Reese tries to protect a software programmer with a mysterious second life, but it's unclear which side of her life the threat is coming from. Meanwhile, Claire, a young hacker who Finch tried to protect from Samaritan, reaches out to him for aid.

Reese and Finch must protect Harper, a street-smart grifter, when her plan to steal cash from a medical marijuana dispensary goes up in smoke.

Reese and Finch try to protect a psychologist whose unorthodox methods for helping his patients find closure could cost him dearly. Meanwhile, flashbacks reveal Finch's fragile state in the days following the bombing that killed his best friend, Nathan Ingram.

Reese must protect a bounty hunter who refuses to let the potential threat to her life deter her from the relentless pursuit of her target. Also, Finch tries to set the plan he began in Shanghai in motion.

Reese and Finch scramble to protect a software CEO when his behavior becomes increasingly erratic following a hacker attack that reveals all his secrets and unravels his life.

Reese finds himself on a perilous personal journey when he takes on a homicide case Detective Carter was never able to close.

Reese and Fusco get caught in the war between the two newest POIs, rival crime bosses Elias and Dominic. Also, a tantalizing clue to Shaw's whereabouts leads Finch and Root into a possible trap, and Control goes rogue to uncover the true intentions of the Samaritan program.

Finch and Root race to save The Machine, which has been located by the rival AI, Samaritan, while Reese is caught in the middle of the final showdown between rival crime bosses Elias and Dominic.

It's a race against time as Reese and Finch try to get the dying Machine to the subway station so that they can decompress it to a server capable of holding its memory. Meanwhile, Root turns to an old friend for identity papers as Decima agents close in on her, and Fusco deals with IAB in the aftermath of Dominic and Elias's deaths.

Finch and Root try to deal with the Machine's reboot, but it flags them--and Reese--as threats due to their violent histories. Meanwhile, Reese and Fusco try to deal with an escalating increase in Numbers... and not all of them are real.

Past and present collide when the team's newest Number is investigating the death of his brother... who Reese killed when he worked for the CIA.

Sameen escapes from Decima and reunites with the team, but is plagued by strange visions and searing headaches. She soon realizes that something is seriously wrong... and there's only one way out.

Reese protects an NYPD analyst whose investigation into a software glitch has drawn the attention of Samaritan. Also, Reese and Fusco are threatened by an ally of Elias's, who is looking to avenge his friend's death.

The Machine sends Reese and Finch to a wedding to protect a pair of POIs before their nuptials. Also, Fusco becomes angry at being kept in the dark by the team and takes it upon himself to investigate a string of missing person reports.

Root goes undercover at a radio station to protect the host of a conspiracy theory show who stumbles upon information that could get him killed. Also, Samaritan's agents try to convince a member of the team that their goals are noble.

Reese and Finch become trapped in a hospital that becomes ground zero for a deadly viral outbreak. Also, Samaritan's newest recruit has second thoughts and Shaw continues to struggle with reality.

The mysterious criminal mastermind known as "The Voice" returns and traps Reese and Fusco in their own precinct with several armed gang members and the latest POI. Also, Root makes a shocking discovery.

Finch's number comes up when a fatal error blows his cover identity and sets off a deadly series of escalating encounters with Samaritan's operatives.

The team must unravel a conspiracy and stay ahead of the Secret Service when the President of the United States becomes their newest POI. Also, Finch separates himself from the team and considers taking drastic action to combat Samaritan.

As Reese and Shaw race to catch up with Finch, he infiltrates a maximum-security government facility in a desperate mission which could mean the end for not only Samaritan, but for himself and The Machine as well.

As Finch's virus spreads, destroying both Samaritan and the Machine, Samaritan makes one last desperate attempt to preserve itself and the team undertakes one last mission to stop it... and not everyone will survive.