World on a Wire (German: Welt am Draht) is a two-part 1973 West German science fiction television serial broadcast on ARD. Shot on 16 mm film, the two-part miniseries is drected by Rainer Werner Fassbinder, who co-writes the screenplay with Fritz Müller-Scherz, based on Daniel F. Galouye's 1964 novel Simulacron-3. In the future, Simulacron, a computer project simulating reality, encounters strange occurrences after its leader's death. Dr Fred Stiller questions the sudden disappearance of a friend and wonders if Simulacron holds the answers.