Ultraman Season 1 Episode 10
A dinosaur-like monster emerges from the depths of Lake Kitayama. The Science Patrol uncovers a mysterious connection between it and the legend of Loch Ness. When they find the creature too powerful to subdue by normal means, Ultraman steps in to take it down once and for all.
Episode Title: The Mysterious Dinosaur Base
Air Date: 1966-09-18