A giant cyborg white whale piloted by five warriors from a sunken continent fights an interdimensional invasion nobody saw coming. The premise is so specific, so wildly committed to its own logic, that it doesn't ask for permission to be ridiculous. Watch it for the mechanics of 1980 TMS animation doing things anime hadn't figured out how to do yet, but stay because the show genuinely believes in a war between two lost civilizations that forgot how to lose.
Long ago, the continents of Atlantis and Mu went to war, and Atlantis was defeated. Now Atlantis has turned itself into a small planet and slipped through time to the present day, determined to conquer the world once more. Standing against it are five warriors from Mu, who gather on Easter Island. Their ally is a colossal cyborg white whale that holds the brain of Mu's ancient queen. Together they battle Atlantis at famous ruins around the globe in this 1980 action, fantasy and science fiction TV series. Despite the name, the story has no connection to Moby Dick, and it was TMS's first series not adapted from an existing work.