Tron

Tron is a 1982 science fiction film starring Jeff Bridges as Kevin Flynn (and his counterpart inside the electronic world, Clu), Bruce Boxleitner as Alan Bradley (and Tron), Cindy Morgan as Lora Baines (and Yori) and Dan Shor as Ram. David Warner plays the villain, Ed Dillinger (and Sark), as well as providing the voice of the 'Master Control Program'. It was directed by Steven Lisberger. Being one of the first films from a major studio to use computer graphics extensively, Tron has a distinctive visual style.