In episode 15, Chris and Alex log on to Tron (Steven Lisberger, 1982), a watershed moment in the history of computer animation and one that taps into the early electronic spectacle of digital visual effects within a Hollywood context. Representing the wonder of - if not the cultural anxieties surrounding - the newness of computers and virtual reality (as well as the growing popularity of videogames), the film reframes cyberspace as a complex three-dimensional fantasy world. Tron invites spectators into the labyrinthine geographies of hardware and software, asking us to marvel at a series of magical mainframes but also to speculate over what digital technology might look like, and how it could be represented onscreen.