Required to assume new identities created by Root, the team tries to adapt to their new lives, but a new number complicates things.

Harold reluctantly agrees to help John protect a young woman who is participating in a dangerous game, meanwhile Shaw continues her extra curricular activities.

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 an NYPD detective becomes complicated when the young brother and sister he's protecting become targets of a gang investigation.

On Election Day Reese shoots a potential jumper and is forced to go into counseling. The new number is for a pollster who suspects the election for Governor of New York was rigged. It was by Samaritan, and his life is now in danger.

John and others try to prevent a fake detective from getting himself killed, while Harold attends a conference in Hong Kong.

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 must save Elias from the Brotherhood. He can't get any help from Root or Shaw since Shaw's cover is blown and Root is escorting her to underground.

Samaritan demonstrates its true power by taking control of New York for 48 hours and erasing crime from the city in an attempt to lure 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 is back and begins to question the methods and intentions of Samaritan. Also, alarming news reports of a pair of vigilantes rampaging through the Northeast begin to surface.

The hunt for Shaw takes Root and Reese to a small town in upstate New York where not everything is as idyllic as it seems. Fusco and a former person of interest team up.

While on a jury for a murder trial, Finch becomes suspicious of another juror. Reese starts to open up to a therapist.

Reese tries to protect a software programmer with mysteries in her personal life. Meanwhile Finch reconnects with Claire, the young woman he met while she was playing Samaritan's Nautilus game.

Reese and Finch's new Number is a Student ID of a college student with a complicated life.

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 fragile state in days following bombing that killed his best friend, Nathan Ingram.

Reese tracks the latest number to an underground casino and its enigmatic hostess.

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

Reese tries to honor Carter's memory by solving a cold case she was unable to.

Reese and Fusco get caught in the war between Elias and Dominic while Finch and Root follow a clue to Shaw's whereabouts.

Finch and Root race to save The Machine, which has been located by the rival AI, Samaritan.