Limitless is a 2011 American science-fiction thriller film directed by Neil Burger and written by Leslie Dixon. Based on the 2001 novel The Dark Fields by Alan Glynn, the film stars Bradley Cooper, Abbie Cornish, Robert De Niro, Andrew Howard, and Anna Friel. The film follows Edward Morra, a struggling writer who is introduced to a nootropic drug called NZT-48, which gives him the ability to use his brain fully and to improve his lifestyle vastly. Limitless was released on March 18, 2011, and became a box-office success, grossing over $161 million on a budget of $27 million. A television series of the same name, covering events that take place after the film, debuted on September 22, 2015, but was cancelled after one season.