A salvage vessel is nearly sunk off the Irish coast by an undersea earthquake. A few nights later, a walking sea monster tangles with the fishing boats and enters the small town. Fishermen from England catch the "60-foot-tall deep-sea creature." The monster is taken to London for a Circus and, with great shock, they find out that the creature is really just a baby. The creature's mother, who is upset and drastically larger, follows his trail to London, leaving a wake of destruction in her path.
The special effects of Gorgo, provided by Tom Howard - two time Academy Award winner - are truly admirable. The monsters are quite ferocious - except when they wiggle their ears.
A lonely boy befriends a baby prehistoric monster named Gorgo. When Gorgo's monster mom discovers her son missing, she goes on a terrible rampage and destroys half of London in a desperate search for her lost reptilian offspring.