Harold Finch built a Machine to watch everything. He never planned for what came after. London, 2021. The third national lockdown has emptied the streets and normalised surveillance in ways no government could have achieved in ordinary times. Into this city comes Sameen Shaw, sent by Finch on a number that looks like a protection job and turns out to be something considerably larger. Person of Interest: London is a continuation of the original series, set in the moral and institutional wreckage of a country that traded civil liberties for safety and is still waiting for the return. It asks the question the original show never quite got to: what happens when the Machine finds someone building the other half of itself?