With Finch missing – kidnapped by his hacker nemesis, Root, Reese enlists Detectives Carter and Fusco to get his friend back, Meanwhile, The Machine never sleeps, disseminating a new number to Reese.

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.

Reese y Finch se enfrentan a un dilema de ética cuando la máquina les da el número de un ejecutor de la mafia que está en peligro; mientras tanto, Finch recibe ayuda de un aliado inesperado.

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

When the machine names a New York cabdriver as a person of interest, any of his passengers could be a part of the impending crime.

As the FBI pursues "the man in the suit," Reese is even more determined to protect the latest person of interest after learning she is the sister of a soldier who was killed in action.

Finch goes under cover to protect a youth who reminds him of himself; Carter goes on a dangerous mission for the FBI.

Carter ayuda a Reese a mantenerse alejado del Agente Donnelly; Reese se reúne con antiguos y nuevos enemigos, y el detective Fusco está por su cuenta ayudando a la nueva POI, la modelo Karolina Kurkova.

Reese es secuestrada por un viejo conocido que está tramando un acto de guerra cibernética.

Finch and Reese meet their match: a tech billionaire whose curiosity and endless resources could expose their identities and ruin their efforts to save his life.

As Reese and Finch try to save a hotel maid's life, they encounter a litany of suspects; Detective Carter considers a significant offer from the FBI.

A lethal 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 skill set equals their own.

Una tormenta acecha el area triestatal y la evacucación es inmediata.

Finch infiltrates a tech corporation to gather intel on an executive whose number has come up; Carter questions Beecher's integrity.

When a person of interest is poisoned, Finch and Reese only have 24 hours to identify the toxin and find the person responsible; Detective Fusco's past catches up to him.

When a virus causes the machine to malfunction, numbers are issued irregularly; the team searches for an extremely elusive tech millionaire.

Finch and Reese team up with unexpected allies as they race to fix the machine; as Detective Carter tries to apprehend Cal Beecher's murderer, she finds herself up against HR -- a criminal organization.