Tron

Kevin Flynn (Jeff Bridges) is convinced that his big ideas are being stolen by the company he works for. While hacking on a company computer, Flynn is brought into an incredible virtual reality where he finds himself pitted against a sentient computer program, the "Master Control Program." Trying to stop the rouge program from taking over the real world as well as cyberspace, Flynn finds himself challenged in a video game world where his real self will perish if he fails. As Flynn fights against the Master Control Program and its henchman Sark (David Warner), he realizes that his best chance to survive rests in finding the legendary computer warrior, "Tron" (Bruce Boxleitner).