Person of Interest is an American science fiction crime drama television series that premiered on CBS on September 22, 2011. The show follows the story of Harold Finch (Michael Emerson), a former software engineer for the government who creates a computer program that can predict future crimes. He teams up with John Reese (Jim Caviezel), a former CIA operative, to stop the crimes before they happen.
Season 4 of Person of Interest premiered on September 23, 2014, and concluded on June 21, 2015. The season consisted of 22 episodes and featured several major plot developments, including the introduction of a new villain, Samaritan, and the death of a major character.