Pay close attention to the 2010 Iraq scenes, which clarify why Alex's brother was targeted and how Reese's "code" has evolved.
This episode is a deep dive into Reese's morality and the consequences of his actions as an operative. Person of Interest 5x3
Alex Duncan ( Stephen Plunkett ), a computer security expert. Pay close attention to the 2010 Iraq scenes,
The case brings back Terence Beale ( Keith David ), Reese’s former CIA supervisor. Beale realizes Reese is alive but chooses to omit this from his official report. Person of Interest 5x3
The Machine sends Root to work as a courier driver. She discovers Samaritan is using the courier service to spread malware via physical equipment.