Person of Interest [OV]

In the series premiere, the social security number of a young prosecutor comes up. Now Reese and Finch must work together to figure out if their person of interest is the victim or perpetrator.

When they are given the Social Security number of a teenager who was killed two years ago, Reese and Finch begin to question the infallibility of The Machine. Meanwhile, Finch flashes back to The Machine's origin and how it was developed.

When the Machine directs Reese and Finch to a former soldier with shady connections to a crime ring, Reese must infiltrate the gang, taking part in their heist. Meanwhile, Detective Carter's closer than ever to finding out who Reese is.

When the number comes up on a promising young doctor, Megan Tillman (guest star LINDA CARDELLINI), Reese and Finch must unravel the threat while she's on-call and after hours.

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 person of interest who wants nothing to do with their brand of vigilante justice.

Reese finds himself captivated by their latest Person of Interest (guest star PAIGE TURCO), a beautiful, shrewd and remarkably resourceful woman adept at problem solving.

The Machine identifies a school teacher who witnessed a mob hit as their next POI. Now, Reese and Finch protect the unfortunate soul who was in the wrong place at the wrong time.

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. ALAN DALE (Lost) guest stars as the person they're tracking.

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

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.

Reese works the computer while Finch does the legwork with their latest target, a building superintendant who keeps too close an eye on his tenants.

It's decision time for Detective Carter. 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.

Reese and Finch's latest Person of Interest is a down-on-his-luck man (guest star MYK WATFORD) who may have reached his breaking point.

The Machine identifies Darren (guest star ASTRO), a teenager whose brother was just murdered, as the next POI. Now, Reese must struggle to protect the teen, who's hell bent on avenging his brother's death.

Reese discovers there's more to the story after he infiltrates a smuggling ring to get close to his latest Person of Interest...who may be hiding a secret identity.

Even white collar crimes have a body count. 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 six-month-old baby, Reese and Finch turn into "overly protective parents" -- with an arsenal at their disposal. Meanwhile, Carter begins to question her new allegiance to Reese and Finch when Elias resurfaces.

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 five numbers, naming the Don of each of New York's crime families, Reese and Finch suspect Elias is planning to eliminate his competition. As Elias takes aim, someone close to Carter may pay the price.

The Machine's latest number places Reese undercover with 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 gives him a day off - especially when he realizes that The Machine's latest number is certain to revive painful memories.

The latest POI finds himself at the center of a dark government conspiracy - one that Finch is all too familiar with. Meanwhile, Reese uncovers something about Finch's past.

In the season finale, a psychologist becomes the target of one of her patients, and Reese must protect her while eluding capture by the FBI, who are closing in fast.