Reese becomes trapped with his POI in a heavily surveilled part of the city and must rely on Finch, Carter and Fusco's help.
Watch Now:AmazonFinch 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.
Watch Now:AmazoniTunesKowalski stakes out a crypt to face his nemesis; Internal Affairs investigates Vecchio.
Reese goes under cover as a secret service agent in order to get close to the latest person of interest, a congressman who may have the key to derailing Decima's plan for a second machine.
Watch Now:AmazoniTunesMultiple enemies target the team as they try to protect a dying man; Reese's absence could lead to catastrophic repercussions.
Watch Now:AmazoniTunesIn therapy, Zoey reflects back on her unexpectedly profound first day working at SPRQPoint.
Watch Now:AmazoniTunesReese asks Detectives Carter and Fusco for help finding Finch, who was kidnapped by his nemesis.
Watch Now:AmazoniTunesFlashbacks reveal Finch's creation of the machine; Reese hits the road, leaving the team to deal with the aftermath of their war with HR.
Watch Now:AmazoniTunesIn the fourth season premiere, the team must devise new ways to continue their work without being detected by Samaritan after they're forced to take on new identities created by Root. Some, however, find it hard to ignore the Machine's numbers, putting them all at risk of being seen by the rival machine.
Watch Now:AmazoniTunesFinch goes under cover to protect a youth who reminds him of himself; Carter goes on a dangerous mission for the FBI.
Watch Now:AmazoniTunesThe 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 for help.
Watch Now:AmazonReese 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.
Watch Now:AmazoniTunesRyan and the Gang Task Force bring a Colombian snitch to Federal Court to testify, but are ambushed en route. Ryan is torn between his Task Force duties and giving up the snitch's location to help Javier and the Acosta family go legit.
Watch Now:AmazoniTunesZoey gets more than she bargained for when she tries to help Emily with a problem. Maggie reconnects with an old friend. Max, Simon and Mo have a bonding night together.
Watch Now:AmazoniTunesAfter Warrick is shot in a Las Vegas alley, the CSI team comes together to deal with the aftermath.
Watch Now:AmazoniTunesWhen classified government documents are leaked online, President Kirkman searches for the party responsible only to find that they have taken refuge inside a foreign embassy and are beyond even his reach. Agent Hannah Wells races furiously to gather evidence of MacLeish’s involvement in the conspiracy before he can be confirmed as the country’s next Vice President.
Watch Now:AmazoniTunesReese 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.
Watch Now:AmazoniTunesGrissom's investigation into the murder of two men leads him to a new encounter with Lady Heather. Catherine is desperate to discover what lead to the near-death of her daughter and why her ex-husband disappeared.
Watch Now:AmazoniTunesCatherine is ordered by a kidnapper to accompany a man who is to deliver $1 million in ransom to him or else he will kill the man's mistress.
Watch Now:AmazoniTunesGrissom and Catherine investigate the murder of a wealthy couple who are discovered outside their glamorous home, which was up for sale. Sara probes the death of a cheerleader who is found eviscerated on a soccer field, her organs having been ingested by her killer.
Watch Now:AmazoniTunesCatherine testifies in a murder trial in which a man is accused of murdering his own mother three years ago, but the suspect is found not guilty. Catherine, however, believes he did commit the crime and that he may also have killed two other people, so she sets out to find the other victims. Grissom prepares to leave on a four-week sabbatical.
Watch Now:AmazoniTunesNick and Pete come to the aid of a troubled ex-football player charged with battery. Meanwhile, Pete becomes exasperated when his father shows up in town.
Watch Now:AmazonWhile investigating an elderly woman's murder, Grissom receives a miniature crime scene replica; Greg attends a hearing to ascertain his culpability in a teenager's accidental death.
Watch Now:AmazoniTunesReese and Finch question the machine's reliability when it prompts the investigation of a teenager who was killed years earlier; Finch recalls the origin of the machine.
Watch Now:AmazonA woman is abducted from a mall parking garage, then raped, beaten, shot and left for dead. Catherine and Warrick are given boxes of evidence from a shooting that goes to trial in four days, and they must re-prove the case.
Watch Now:iTunesThe CSIs investigate when the body of an unidentified young woman is discovered stuffed in an overturned shopping cart near a freeway underpass.
Watch Now:iTunesA bus carrying 23 passengers from Los Angeles to Las Vegas crashes less than 40 miles from its destination, killing nine people. The CSIs soon discover that a recent parolee was on the bus, but is now unaccounted for.
Watch Now:iTunesGrissom and Catherine investigate the stabbing death of an 80-year-old woman who lived in a run-down house full of cats. Nick and Sara comb through the remains of a car bombing that appears to be a murder plot gone awry.
Watch Now:iTunesWhen the CSIs are called to a murder scene at a familiar motel, Nick is thrown for a loop as he pieces together three separate murder investigations that all took place at the same establishment over the course of a year.
Watch Now:iTunesGrissom and Catherine investigate the murder of a despised comic who died onstage, apparently after drinking from a tainted bottle of water. Brass reopens a woman's accidental-death case after spotting the deceased's husband in a flashy new car with a trophy date on his arm.
Watch Now:iTunesGrissom returns from his sabbatical; Keppler is put into a compromising position when the bodies of a Trenton police officer and a hooker are found in a hotel room. The man who found them is a retired New Jersey cop and close friend to Keppler, who doesn't reveal their relationship.
Watch Now:iTunesThe CSIs investigate the gruesome murder of Lady Heather's estranged daughter, Zoe, who was found in the middle of the Vegas desert.
Watch Now:iTunesFollowing the discovery that a U.S. ambassador is selling classified intelligence to a Colombian cartel, Shepherd devises a plan to catch him that will push Keaton’s moral code to the brink. Keaton brings a new member on to the team.
Watch Now:AmazoniTunesGary and Maggie gain much more than breathing techniques at their birthing class. Meanwhile, Rome and Regina’s quest to hire a caregiver for Walter takes an unexpected turn, and Theo learns a tough life lesson from an unlikely duo.
Watch Now:AmazoniTunesA boxing champ dies in the ring, but Grissom finds evidence that points to murder. Catherine works a crime scene where a Los Angeles gang member was gunned down. Nick investigates a jewelery-store robbery.
Watch Now:iTunesOne of two couples who meet in a bar is murdered and, when the second couple meets the same fate in a similar fashion, the team suspects a pair of serial killers is on the loose. Catherine gets some troubling news about her father's murder trial.
Watch Now:iTunesWhen the lead suspects in Grissom's serial killer case are murdered, he suspects an inside job. Catherine and Sara investigate when a college football fan's body is found in a bathtub.
Watch Now:iTunesCourt is in session for the trial of Metallo, but he turns the tables when kryptonite is smuggled into the courtroom, giving him strength to overtake it, and Superboy. He puts Superboy on trial while on the stand, subdued by the green rock, and it will take the teamwork of everyone in the room to bring Metallo down.
Watch Now:AmazonWhen Superboy tries to intercept a meteor that is approaching Earth, he is injured, resulting in amnesia. In the forest, a mother and son find him and nurse him back to health, while he rediscovers who he truly is. All the while, the mother and son are in hiding, trying to avoid death, courtesy of the boy's father.
Watch Now:AmazonAn elderly woman crashes her car into a crowded restaurant. Grissom and Nick investigate the possible carbon monoxide murder of a woman in her home.
Watch Now:iTunesAfter Commander Guziewicz narrowly escapes when her home is burned down, the arson investigation leads Russ and Milt to a variety of suspects, including a string of ex-lovers and her own estranged son. Also, Russ is determined to find out who sent Holly a gift.
Watch Now:AmazoniTunesNick takes the lead on a case where in the house a family of four, three pools of blood are found. Nick thinks that the little girl may still be alive, but Sara is doubtful, thinking that Nick's recent near-death experience is affecting his judgement.
Watch Now:iTunesThree tourists are beat up, badly. One is dead, Alfonzo. Jessica is badly beaten but is still alive. Stanley, the last tourist is saved by Greg who ends up severely hurt in turn and ends up hospitalized after having to make a life altering decision.
Watch Now:iTunesGrissom, Warrick and Nick investigate the case of man murdered by being pushed off a six storey building. Catherine looks into the murder of man outside his regular bar.
Watch Now:iTunesGrissom and Sara investigate the murder of a mental-hospital patient and quickly narrow down the suspects to a handful of other patients and staff members.
Watch Now:iTunesGrissom and Nick investigate the death of a book restorer while Catherine and Sara are called to the scene of a fatal train crash.
Watch Now:iTunesGrissom investigates a possible suicide at a high-profile construction site. Catherine takes on a case with a teenage boy who dies while in session with his female psychologist,
Watch Now:iTunesSuperboy tries to stop a guerilla-style gang, and is then framed for the death of its leader, which was really caused by a member of the gang. Fearing that he did cause the man's death, Superboy retreats to Smallville, where he vows to never use his powers again.
Watch Now:AmazonGrissom and Catherine investigate when a leg is found severed from a body in a lake. Sara and Nick investigate a fraternity pledging gone terribly wrong.
Watch Now:iTunes