The creators of Babylon 5 (1993) discuss how they developed the future technologies and societies portrayed in the series and the movies, set 200 to 250 years after today. Items discussed include: the use of Gerard O’Neill’s space-habitat concepts for the Babylon 5 station, rotating to generate artificial gravity and featuring “greenbelts” and fast-closing guillotine doors; faster-than-light travel utilizing hyperspace and “jump gates” for entry and exit to normal space; design of the Starfury fighter, combat and weapons in space, and the nagging question of whether to use sound effects in the near-vacuum of space.