To combat Root and Decima, Reese and Finch must seek out unusual allies to save The Machine. Meanwhile, HR prepares to eliminate Carter when she probes into Cal's death. And in the past, the final fate of Nathan is revealed.moreless
The Machine becomes increasingly erratic because of the computer virus, and Reese and Finch must find an elusive tech millionaire. Meawhile, Carter puts herself at risk when she tries to find Cal's killer.moreless
The newest Number is a famous cardiologist, but by the time Reese gets to the man, it's too late: he's already been given a slow-acting irreversible poison. While Reese and the doctor try to track down the man who poisoned him, Carter has a tough decision to make when IAB moves in on Fusco for the murder of his partner a year ago.moreless
While Carter tries to determine if her boyfriend is working with HR or not, Finch infiltrates a tech corporation to determine if their new Number is trying to help the company or hurt it.moreless
While Carter deals with corruption within her own department, Reese and Finch help an elderly gambler and try to figure out why the mob wants him dead.
Reese and Finch head off to a small coastal town when The Machine gives them the Numbers of six missing people. When a storm moves in, they are trapped at a police station with several locals... and one of them is a killer.moreless
Reese and Finch must help their new Number, a counter-terrorist operative who is on the run from her own people.
Reese and Finch attempt to protect Mira, a hotel maid with a long list of enemies. Meanwhile, Carter gets a job offer due to her help in the "man in the suit" case.moreless
Reese and Finch try to help a billionaire tech magnate only to discover that doing so may compromise their existence when he sets out to find out who they really are and what they know.moreless
Reese's former partner Kara abducts him as part of her scheme to unleash a wave of cyber-terrorism across the world and get revenge on the people she believes wronged her.
While Carter tries to maintain her cover as an FBI temporary agent while helping Reese, Fusco has to protect a new Number on his own while Reese ducks some old enemies from the past.moreless
The team's newest Person of Interest is a teen genius and Finch goes undercover as a substitute teacher to protect him. Meanwhile, Carter takes on her first assignment as a temp agent for the FBI.moreless
As the FBI renews their hunt for Reese, he and Finch try to help a sister of a dead soldier seeking justice for wronged veterans.
Reese and Finch must track a cab driver whose Number has come up... but they don't know if he's involved or if one of his passengers may be the intended victim or predator. Meanwhile, Simmons continues to put pressure on Fusco.moreless
The team has to protect two Persons of Interest when the Machine gives them the numbers of a husband and wife.
Reese and Finch set out to protect a surgeon who has come up as their newest Person of Interest. However, when they discover that someone from Reese's past is involved, they turn to a former Number for help.moreless
Reese is off to the suburbs to take on an undercover assignment to protect the newest Number.
Reese must protect an investigative journalist without letting her know that he's around, for fear of blowing his and Finch's cover.
Reese and Finch must decide whether to help a mob triggerman who is their newest Number, or leave him to his well-deserved fate.
Reese returns to field work and must protect the spoiled daughter of a Brazilian diplomat.
In Texas, Reese and Carter investigate the disappearance of a 14-year-old girl from over a decade ago that may lead them to Finch and his abductor.
Reese and the Machine join forces to track down Finch, who has been abducted by the mysterious Root.
The FBI close in on Reese, who is trying to protect a psychologist from one of her patients. Meanwhile, Finch receives a visit from an old friend.
Finch finds a lot of in common with their newest Number, who has run afoul of the government. Meanwhile, Reese learns about Finch's past.
Finch gives Reese his birthday off so that his partner doesn't have to face a Number reminiscent of a case from Reese's past.
Reese goes undercover as an armored car company employee, and faces memories from his past with the CIA.
Reese and Finch learn that their new Numbers are the five Dons of New York City, and figure that Elias is making his move for complete control of organized crime.
Reese and Finch discover that their newest Number has almost no digital footprint... and a double life.
Reese and Finch become day-care providers when the Machine gives them the number of a six-month-old baby. Meanwhile, Carter begins to question her alliance with the two men when Elias shows up.
The new Person of Interest is a young trader who has become involved in a multi-million dollar financial scam, and Reese has to pose as a wealthy investor to watch their client.