Complete story — includes the ending
Reese and Fusco reunite with Shaw after burying Root and travel to Washington, D.C. to protect their newest number, The President of the United States. But Shaw is worried about the implications behind Samaritan's neglecting to intervene. The threat is identified as a domestic terrorist group who are against the President's surveillance programs. The attempted assassination is stopped with the unexpected assistance of former POIs Logan Pierce, Joey Durban, and Harper Rose who each camouflaged themselves into various useful covers. The three reveal that they now work for the Machine, having been given the irrelevant number of Reese's cover identity while the team got the relevant number of the President. Fusco, Shaw, Reese, Logan, Joey, and Harper discuss their enlistment by the Machine, what has happened, and what is to come before Logan provides the team with their next number: Harold. Harold, meanwhile, is grieving over the loss of Root and reaches a conclusion that brings him to a highly-secured government facility in San Antonio, Texas with a weaponized virus capable of destroying Samaritan, but with significant collateral damage. Harold has become ready to go to any lengths and Reese and Shaw prepare for their final battle.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Person of Interest season 5. HTML formatting and reference markers removed. · Content license