On this week's Person of Interest…
After three days of silence the machine gives Reese and Finch six numbers.
They discover there is a serial killer assuming people's identities.
Braving a storm, Reese and Finch attempt to discover the culprit on Owen Island.
Finch learns that the supposed FBI agent that had been working with Reese was the real killer.
Carter arrives just in time to save Finch, and Cal Beecher finishes him off.
Finch knows that there was a glitch with the machine and it means a calm before the real storm.