Limitless is an American crime drama television series. It stars Jake McDorman as Brian Finch, who discovers the power of a mysterious drug called NZT-48 which opens the full possibility of his brain and gives him perfect recall of everything he has ever read, heard, or seen. It was conceived by the film of the same name, which in turn was based on the novel The Dark Fields, and takes place after the events of the movie. The series was ordered by CBS on May 8, 2015, and debuted on September 22, 2015.