Jonathan Nolan's Person of Interest continues to impress viewers with its smart plotting and impressive leads. Jim Cavaziel and Lost's Michael Emerson join forces to solve crimes before they happen with the help of a surveillance AI simply called The Machine. The third series kicks off with Root imprisoned in a psychiatric hospital and cut off from any kind of technology. Meanwhile, Finch and Reese are hunting a navy sailor who the Machine has identified as a target. There's just one problem - 4,000 sailors are in town for shore leave.