"Limitless" is a 2011 science fiction thriller film directed by Neil Burger. It stars Bradley Cooper as Eddie Morra, a struggling writer who discovers a mysterious drug called NZT-48 that enhances his cognitive abilities. As he experiences extraordinary mental clarity and productivity, he quickly rises to success but also faces dangerous consequences. The film explores themes of ambition, addiction, and the ethical implications of using such a powerful substance. As Eddie's life spirals out of control, he must confront the dark side of his newfound abilities and the people who want to exploit them, including a ruthless businessman played by Robert De Niro.