Picking up where the blockbuster motion picture left off, Godzilla: The Series is a fast-paced animated adventure series that pits humanity against a new generation of giant monsters.

Godzilla is a 30-minute animated series co-produced between Hanna-Barbera Productions and Toho in 1978 and aired on NBC in the United States and TV Tokyo in Japan. The series is an animated adaptation of the Japanese Godzilla films produced by Toho. The series continued to air until 1981, for a time airing in its own half-hour timeslot until its cancellation.

Mothra's dark counterpart, Battra, emerges to eliminate humanity on behalf of the Earth. Two tiny fairies called the Cosmos offer their help by calling Mothra to battle the creature. Unfortunately a meteorite has awoken a hibernating Godzilla as a three way battle for the Earth begins.

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.

Searching for his brother, Ryota stows away on a boat belonging to a criminal alongside two other teenagers. The group shipwrecks on Letchi island and discover the Infant Island natives have been enslaved by a terrorist organization controlling a crustacean monster. Finding a sleeping Godzilla, they decide to awaken him to defeat the terrorists and liberate the natives.