With General Grant’s deadline only two days away, a gang of riders attacks Cheyenne while Cullen and Elam pay Durant a visit.

Cullen helps Elam track down a dangerous criminal; the town prepares to move down the tracks.

After his workers defect to the Mormons, Cullen recruits Durant to help get them back. Meanwhile, Sean and Mickey’s past comes back to haunt them.

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…

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

After a hard winter, Cullen and Elam travel to New York to secure their positions on the railroad as Durant fights for his legacy from prison.

The latest POI — a deadly yet sexy government operative (Sarah Shahi) who tackles terrorist threats — proves difficult for Reese and Finch to protect.

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

Finch and Reese head to Atlantic City to protect the latest person of interest, an elderly gambler; Carter tries to clear another detective’s name.

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.

As Finch and Reese try to protect six people simultaneously, clues lead them to a coastal town; when a storm forces Finch and Reese to seek shelter in a police…

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

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…

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

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

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

Carter tries to help Reese by engaging in mental warfare with the FBI; Reese has encounters with old and new enemies; Detective Fusco must protect supermodel Karolina Kurkova, the latest…

Reese is abducted by a former acquaintance planning a massive and potentially deadly act of cyber-warfare.

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…

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.

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.

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…

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.

Reese goes undercover as an armored car company employee, and faces memories from his past with the CIA.

The Machine’s latest number presents a unique challenge for Reese and Finch since the person has virtually no digital footprint – and appears to be leading a double life.

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,…

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.

Finch gives Reese his birthday off so that his partner doesn’t have to face a Number that is tied to Reese’s past.

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…

As the clock ticks down, Reese winds up trapped with his POI in the most heavily surveilled part of the city, forced to rely on the help of Finch, Carter…

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.

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…

The Machine gives Reese and Finch the number of a down-and-out man who has been pushed too far, and they’re forced to turn to former Person of Interest Zoe Morgan…

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…

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…

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…

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

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…

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.