 Although "The Green Slime" was released in the U.S. as a 90 minute version,  director Kinji Fukasaku and his editor prepared a much more tightly edited 77  minute version (called "Gamma III: Big Military Space Operation") for release  in Japan. This "Japanese" version eliminates the Robert Horton/Richard  Jaeckel/Luciana Paluzzi relationship triangle, and is much more  "militaristic" in tone. Several scenes are edited differently, additional  alternate music cues are used (which are less "sci