PG | | Action, Adventure, Family
A man begins to suspect that something is wrong about his employers; meanwhile, Godzilla and Anguirus are alerted to something strange going on.
The original script for this film was entitled "King Ghidorah's Great Counterattack" (Kingu Gidora no Daigyakushû), which featured Godzilla, Rodan and Varan fighting Ghidorah, Gigan, and a new monster named Mogu. It was then reworked into the more appealing "Godzilla Vs. The Space Monsters: The Earth Defense Command" (Gojira tai Uchû Kaijû: Chikyû Bôei Meirei). The script pitted Godzilla, Angilas, and Majin Tuol (a giant stone idol, similar to Daimajin) against King Ghidorah, Gigan, and Megalon, all three recruited by an evil alien brain called Miko. This second script was ultimately reworked into the film it is today. The Godzilla Tower, originally from the script, was part of a world fair amusement park, and was not made for an evil purpose like in the final film (in one scene, Gigan actually mistook it for the real Godzilla!). Megalon finally made his debut in Godzilla vs. Megalon (1973), and Majin Tuol was reworked into King Shisar in Godzilla vs. Mechagodzilla (1974).
Angirasu: What do you want?
Gojira: Something funny going on, you better check!
Gojira: Hurry up!
When circling above the Godzilla tower, King Ghidorah and Gigan appear much, much smaller than when they're on the ground.
In the opening credits of the Japanese version, colorful lasers shoot from different directions, and pop up into strips within which each credit appears in white text. In the English versions, only the sound FX of the lasers are heard (standard text credits were used).
For the scenes of Godzilla and Angilas talking to each other, word balloons are used in the Japanese version, but Toho's international English version (used for Cinema Shares' edited US print titled "Godzilla on Monster Island"), uses actual English dialogue.