FUTUREWORLD (1976, USA, 108m, PG) **½ Sci-Fi, Thriller dist. American International Pictures (AIP) (USA), Brent Walker Film Distributing (UK); pr co. American International Pictures (AIP) / Aubrey Company; d. Richard T. Heffron; w. Mayo Simon, George Schenck; pr. James T. Aubrey, Paul N. Lazarus III; ph. Gene Polito, Howard Schwartz (Metrocolor | 1.85:1); m. Fred…