Tron

Tron is a 1982 American science fiction film written and directed by Steven Lisberger. It stars Jeff Bridges as the protagonist Kevin Flynn, Bruce Boxleitner as security program Tron (and Tron's "User", Alan Bradley), Cindy Morgan as program Yori (and her "User", Dr. Lora Baines), Barnard Hughes as the tower guardian Dumont (and his User, Dr. Walter Gibbs) and Dan Shor as Ram. David Warner plays all three main antagonists: the program Sark, his "User", Ed Dillinger, and the voice of the artficially intelligent Master Control Program. The film tells the story of Flynn as he attempts to hack into the ENCOM mainframe to prove that Dillinger has appropriated his work, but ends up being transported into the Digital World itself as a unique program/User. There, he teams up with Tron to defeat the Master Control Program, who has been controlling the Digital World.