On this week's Person of Interest...
Reese and Shaw continue to try and find Finch, but the Machine gives them five numbers, including Control.
Root prepares her team of computer hackers as she tries to find Samaritan.
Greer speaks with Finch about the use and power of Samaritan.
Vigilance descends on the five numbers, Reese and Shaw.
Hersh shows up and chooses to team-up with Reese and Shaw.
Vigilance captures Greer, Finch, Control and a few other members it considers a part of the Machine and the invasion of privacy. They will all be put on trial.
Collier's past reveals his brother was wrongly accused of being a terrorist. After angry at the government for twisting information leading to his brother's suicide, Collier receives text messages telling him there is more to the story.