Adventures of the super-sub Stingray and the World Aquanaut Security Patrol and their battles against Titan, leader of the underwater city of Titanica.

A compilation of four episodes from the Supermarionation series Stingray. When aquatic aliens plot to take over the planet, the world aquanaut security patrol are called in to battle the aliens.

An American in London kills the husband of a woman he covets. She returns the favor by killing his fiancée.