The Best Episodes of Person of Interest Season 4

Samaritan launches a cyber-attack on the stock exchange, forcing the team to risk their lives in a desperate mission to stop a global economic catastrophe.

Director: Chris Fisher

Writer: Denise Thé

Finch and Root race to save The Machine, which has been located by the rival AI, Samaritan. Also, Reese is caught in the middle of the final showdown between rival crime bosses Elias and Dominic.

Director: Chris Fisher

Writer: Greg Plageman, Dan Dietz

Reese and Fusco get caught in the war between the two newest POIs, rival crime bosses Elias and Dominic. Also, a tantalizing clue to Shaw’s whereabouts leads Finch and Root into a possible trap, and Control goes rogue to uncover the true intentions of the Samaritan program.

Director: Fred Toye

Writer: Denise Thé, Andy Callahan

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.

Director: Richard J. Lewis

Writer: Erik Mountain

Control, who oversees the handling of relevant numbers for the government, begins to question the methods and intentions of the Samaritan program. Also, alarming news reports of a pair of vigilantes rampaging through the Northeast begin to surface.

Director: Stephen Surjik

Writer: Andy Callahan

Samaritan shows its power by erasing crime from the city for a day in an attempt to force The Machine out of hiding.

Director: Michael Offer

Writer: Amanda Segel

While Reese is forced to go to counseling for his violent tendencies, Root, Shaw and Finch try to help a new POI.

Director: Kenneth Fink

Writer: Lucas O'Connor

Forced to take on new identities provided by Root, the team members try to adapt to their new lives. However, some find it hard to ignore The Machine's numbers, which puts them all at risk of being detected by Samaritan.

Director: Richard J. Lewis

Writer: Erik Mountain, Greg Plageman

Despite not wanting to help with the new numbers, Finch's interest is piqued when the newest person of interest turns out to be a brilliant college student involved with a mysterious scavenger hunt.

Director: Chris Fisher

Writer: Melissa Scrivner-Love, Dan Dietz

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

Director: Stephen Surjik

Writer: Zak Schwartz

Reese finds himself on a dangerous personal journey when he takes on a homicide case Detective Carter was never able to close.

Director: Alrick Riley

Writer: Melissa Scrivner-Love, Erik Mountain

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.

Director: Richard J. Lewis

Writer: Tony Camerino

Root and Reese investigate a small town in upstate New York that holds the key to Shaw's location... and whether she's dead or alive.

Director: Kevin Bray

Writer: Lucas O'Connor

Reese tries to protect a software programmer with a mysterious second life, but it’s unclear which side of her life the threat is coming from. Meanwhile, Claire, a young hacker whom Finch tried to protect from Samaritan, reaches out to him for aid.

Director: Stephen Semel

Writer: Dan Dietz

Reese, Shaw and Fusco must protect a unassuming office worker who stumbles into a dangerous conspiracy while moonlighting as fake detective. Finch travels to Hong Kong as part of his academic cover identity.

Director: Stephen Surjik

Writer: Ashley Gable

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.

Director: Sylvain White

Writer: David Slack

Reese must protect a bounty hunter who refuses to allow the potential threat to her life sway her from the relentless pursuit of her target. Also, Finch tries to set the plan he began in Shanghai in motion.

Director: Helen Shaver

Writer: Ashley Gable

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. Reese must find a way to play by the rules at his new day job. The Machine sends Finch and Root on a mysterious errand.

Director: Fred Toye

Writer: Amanda Segel

When the Machine arranges for Finch to sit on the jury of a murder trial, he begins to suspect that a fellow juror is set to rig the proceedings. Meanwhile, Reese begins to open up to the department’s therapist.

Director: Kate Woods

Writer: David Slack

Reese's cover job as a detective at the NYPD becomes complicated when the young brother and sister he's protecting become targets of a gang investigation.

Director: Chris Fisher

Writer: Denise Thé

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

Director: Chris Fisher

Writer: Sabir Pirzada, Hillary Benefiel

Reese and Finch must protect Harper, a street-smart grifter, when her plan to steal cash from a medical marijuana dispensary goes up in smoke.

Director: Fred Toye

Writer: Amanda Segel, Greg Plageman