The Green Slime (Japanese: ガンマー第3号 宇宙大作戦, Hepburn: Ganmā Daisan Gō: Uchū Daisakusen, lit. 'Gamma 3: The Great Space War') is a 1968 tokusatsu science fiction film directed by Kinji Fukasaku[1] and produced by Walter Manley and Ivan Reiner.[2] It was written by William Finger, Tom Rowe and Charles Sinclair[1][2] from a story by Reiner.[1] The film was shot in Japan with a Japanese director and film crew, but with the non-Japanese starring cast of Robert Horton, Richard Jaeckel and Luciana Paluzzi.
After destroying a huge asteroid that was on a rapid collision course with Earth, a group of astronauts discover they have accidentally returned to their space station with an alien slime creature that feeds on radiation and can reproduce rapidly from its own blood.