Finch and Root try to deal with the Machine's reboot, but it flags them--and Reese--as threats due to their violent histories. Meanwhile, Reese and Fusco try to deal with an escalating increase in Numbers... and not all of them are real.

Sameen escapes from Decima and reunites with the team, but is plagued by strange visions and searing headaches. She soon realizes that something is seriously wrong... and there's only one way out.