This direct-to-video documentary takes an intriguing trip down memory lane, celebrating sci-fi cinema's trailblazers, including special-effects maven Ray Harryhausen and scribe Ray Bradbury. Interweaving classic sci-fi movie clips and interviews with filmmakers such as Peter Jackson, George Lucas, Steven Spielberg and John Landis, the program covers the genre's evolution -- from stop-motion animation to spectacular computer-generated imagery.