Yes, this is the movie where Godzilla does his little dance of joy, completing his anthropomorphic change from mindless instrument of destruction to sentient hero. The sixth entry into the series also marks a shift from 'horror' to 'science fiction', as "Invasion of Astro-Monster" opens with some nonsensical 'space talk' while a rocketship carrying two astronauts (Glenn and Fuji; Nick Adams and Akira Takarada respectively) travel to a newly discovered moon of Jupitar (christened 'Planet X'), only to find it populated by 'Xians' and besieged by Ghidorah. The Xians offer a cure for cancer in exchange for permission to 'borrow' Rodan and Godzilla, whom they plan to use to eliminate the Ghidorah threat, or so they claim. Suspicious events are occurring on Earth and the astronauts sense that there might be something malignant behind the Xians benign offer. In this film, the now sentient saurian is a full-fledged hero - recruited by the Xians to fight an evil monster and later defending the Earth itself. His original transgressions seems to have been forgiven or forgotten (Fuji, who feels sorry for leaving the Earth monsters on Planet X, comments that Godzilla and Rodan "cause troubles sometimes" - a considerable understatement, considering that, over the years, they have destroyed the cities of Fukuoka, Osaka and Tokyo, presumably at the costs of thousands of lives and billions of Yen). Notwithstanding Godzilla's infamous victory jig after his initial routing of Ghidorah, the film* is not played for laughs as much as was "King Kong vs. Godzilla" but remains a pretty juvenile outing, with a 'good guys vs. bad guys' plot, simplistic characters, an inconsistent (and at times nonsensical) storyline, a silly script, and lots of monster fights. The decline in the series' budget is apparent as most of the brawls are on the desolate Planet X or in unpopulated parts of Japan rather than in the complex (and expensive) city sets that were common in the earlier films and gave some sense of verisimilitude to the inherently unrealistic suit-mated monsters. There are some good parts - I like the spaceships, the alien 'airlift' of the monsters, the almost surreal scenes on Planet X with Jupitar looming in the sky, and as always, Ghidorah makes for an entertaining foe. Overall, very watchable by fans of the genre but pretty much what most non-fans would expect to see if invited to join in: another goofy Japanese monster movie. *This review refers to the subtitled Japanese version; however, as the film was an American-Japanese coproduction (hence American co-star Nick Adams), there is little difference between the subtitled and English dubbed versions.
