Who or what is keeping The Machine from seeing all the pieces of an impending catastrophe? Maybe Root's team of hackers can help. Check out the spoilers in the official guide for Person of Interest Season 3 Episode 22, "A House Divided," airing May 6 on CBS.
THE MACHINE NEEDS THE TEAM’S HELP TO PREVENT A CATASTROPHIC EVENT
When an unknown entity prevents The Machine from seeing the full picture of an impending catastrophic event, it sends the team five separate numbers to help them piece together the bigger picture. Meanwhile, Root’s team of hackers arrives in New York.