Asylum (Person of Interest)

Control (Camryn Manheim) and her henchmen kidnap a woman (Erin Dilly) after crashing her car and put a body in the woman's car before setting it on fire. She then tortures the woman, accusing her of working with Samaritan. After hours of denial, the woman finally admits to work for it, warning Control about something coming. Meanwhile, Reese (Jim Caviezel) and Fusco (Kevin Chapman) investigate a crime scene where one of Elias' hitmen killed members of The Brotherhood. The Machine then produces two numbers: Dominic (Winston Duke) and Elias (Enrico Colantoni).

Reese and Fusco discover that Elias has set up a base of operations at the New York Savings Bank. They confront Elias, who refuses their help. Then, The Brotherhood ambushes the bank and captures them, with Harper Rose (Annie Ilonzeh) among them. At the train station, Shaw's phone rings and Root (Amy Acker) answers, hearing Shaw's voice asking for her help before hanging up. Despite Finch (Michael Emerson) being convinced that it's a trap, Root still intends to find Shaw. She blackmails the Machine to help them by threatening to kill herself in the rooftop of a building. The Machine gives her admin access to help her. They trace the call to an psychiatric hospital.

Finch and Root access the hospital's fiber-optic system and find a cryptic message from Samaritan, stating its intentions to find the Machine as it beginst to crack Finch's laptop. In order to get more information, Root poses as a doctor while Finch is put in the hospital posing as a patient. He causes an inmate to fight the guards, which allows him to enter the control room and discover that the hospital's ninth floor is extremely guarded, housing the worst patients in the hospital. Root infiltrates the floor and discovers that the hospital serves as the base of operations for Greer (John Nolan) and Samaritan. She tells Finch to escape while she goes to retrieve Shaw but realizes that she has been transferred out of the hospital. She then fights Rousseau (Cara Buono) but she is subdued and sedated.

Reese, Fusco and Elias are tortured by The Brotherhood to reveal Finch's location, as they want control of the Machine, but none of them speaks out. They also want the location of a mole in The Brotherhood who worked for Elias. Elias finally gives in and reveals a phone call to confirm his mole. Dominic answers it and then kills his right hand man Link (Jamie Hector) for being identified as the rat. However, Elias laughs, revealing that he didn't have a mole in The Brotherhood and tricked Dominic to kill his friend, avenging Scarface's death. Unaware to Reese and Elias, Fusco knows that Harper was sent by the Machine. Back at Washington, D.C., Control is told by the Samaritan operative that a big event called "The Correction" will arrive on May 6 and there's nothing to stop it. As she won't say anything else, Control kills her.

Finch is captured by Greer and Root is tied to a bed in order to gain access to the Machine through her head. Before allowing it, she snaps Rousseau's neck, killing her. Samaritan gives them an ultimatum to reveal the location of the Machine or both Root and Finch will die. Despite Root's and Finch's insistence in not revealing anything, the Machine itself tells them it can't lose them and exchanges its location for their lives. They are released and Root and Finch race to find the location before Samaritan arrives. Shaw (Sarah Shahi) is revealed to be going in one of Samaritan's cars. The episode ends as Samaritan sends all of its assets to the Machine's location.

• "Asylum" at IMDb