Fan Casting Christopher Nolan's Person of Interest

The series centers on a mysterious reclusive billionaire computer programmer, Harold Finch, who has developed a computer program for the federal government known as "the Machine" that is capable of collating all sources of information to predict terrorist acts and to identify people planning them. The series raises an array of moral issues, from questions of privacy and "the greater good", the concept of justifiable homicide, and problems caused by working with limited information programs.