The Beta test of Samaritan begins, but Finch is hidden and Root helps Reese and Shaw to avoid cameras. Grace will travel to Italy for a job interview and Reese and Shaw posing as cops save her from a Decima's man. They head with her to Fusco's precinct to protect her. Root arrives and help them destroying the cameras inside the police station. Then she blow-up a building where Decima's agents are. Reese, Shaw and Grace flee, but they are hit by a truck and Grace is kidnapped. Now Greer wants to use Grace to be exchanged per Finch. Root, Reese and Shaw head to a containership where might be the hideout of Grace. However, they find all the crew murdered and several servers stocked in a container.
"Beta" is another excellent episode of "Person of Interest", with the return of Grace Hendricks. Finch's former fiancée has an important role in this episode, leading Finch to the ultimate sacrifice to save her life. What Root will do with those servers is the greatest question in the moment. My vote is nine.
Title (Brazil): "Beta"