The film deals with the recruitment of race car driver Jiro Miki (Masao Kusakari) and his dog, Caesar, to a group of people who use ESP, psychokinesis, and other special mental abilities to fight crime.
Inventor Goro Ibuki creates a humanoid robot named Jet Jaguar. It is soon seized by an undersea race of people called the Seatopians. Using Jet Jaguar as a guide, the Seatopians send Megalon as vengeance for the nuclear tests that have devastated their society.
A giant asteroid is heading toward Earth so some astronauts disembark from a nearby space station to blow it up. The mission is successful, and they return to the station unknowingly bringing back a gooey green substance that mutates into one-eyed tentacled monsters that feed off electricity. Soon the station is crawling with them, and people are being zapped left and right!
A businessman with a disfigured face obtains a lifelike mask from his doctor, but the mask starts altering his personality.
A floating amorphous life-form descends from the atmosphere to consume carbon in the form of diamonds.
Journalists Ichiro Sakai and Junko cover the wreckage of a typhoon when an enormous egg is found and claimed by greedy entrepreneurs. Mothra's fairies arrive and are aided by the journalists in a plea for its return. As their requests are denied, Godzilla arises near Nagoya and the people of Infant Island must decide if they are willing to answer Japan's own pleas for help.
A Japanese family is torn apart by the tensions of an avoidable nuclear world war between the superpowers.
Shipwreck survivors found on the presumably uninhabited Infant Island leads to a scientific expedition that discovers a surviving native population along with the Shobijin, tiny twin fairy priestesses of the island's mythical deity called Mothra. After the fairies are kidnapped by an exploitative businessman named Clark Nelson, Mothra sets out to rescue them.
George Mihara was ordered by his grandfather Tom to go to Japan. The purpose was to deliver a $100,000 check to Matsuyama, a Japanese soldier who had helped Tom around the time of World War I, and to perform some act of kindness in Japan using $300 pocket money. This was to test whether George was a suitable boy to inherit Tom's YES Ranch.