Stream the full Thundercats Season 1 Episode 21 movie online for free in crystal-clear HD quality. No downloads required—just press play and enjoy the action, complete with English subtitles for an enhanced viewing experience.
Thundercats: An old scientist seeks the Thundercats to help him save the oceans of Third Earth. Long ago, a crack was made in the bottom of the ocean which caused the water to drain into the earth's core. Dr. Dometone created a plug which sealed the hole in the ocean, and saved Third Earth from destruction. Now, an evil plundarrian, Scrape, has come to Third Earth to remove the plug and mine the rock that is found on the bottom of the ocean, a rock that powers his planet - Blue Plun-Darr. The Thundercats join Dr. Dometone and his frog-type robot Hercie to save the planet from total destruction.