While out swimming, Wilykit is apparently devoured by a huge, green, amphibious monster. The monster is a robot, Herky, belonging to Dr. Dometome, latest in a long line of guardians of the Great Oceanic Plug. The plug prevents the seas from pouring into Third Earth's molten core, extinguishing the fires, heralding an Ice Age and destroying all life. Far from threatening Wilykit, Dr. Dometome has traveled to the Cats' Lair to ask the Thundercats for help: Scrape, a salvage expert from Blue Plunder, is trying to pull the plug in order to drain the ocean and retrieve rocks from the ocean floor. The rocks are needed to fuel his planet. It seems that Dr. Dometone's mission may be too late, for Scrape's giant Electric Eel has already broken into the plug's protective dome, and scared Dr. Dometome's staff off, before he, Lion-O and the Thunderkittens arrive in Herky. Herky overcomes the Electric Eel, but Scrape escapes with Wilykat, locking himself into the plug's dome and proceeding with his plan to drain the ocean. Lion-O summons the Thundercats and Panthro seals off the dome with a compressed air bubble. Scrape is sucked out of the dome and escorted to the Grey Prison Planet by Officer Mandora. Wilykat is rescued and a communications line is set up between the Plug and the Lair to ensure the safety of Third Earth.

This episode can be found on

Disc 4

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