The Driller, Mumm-Ra's servant who captured Panthro for him in Spitting Image, returns to aid Mumm-Ra once again. His job this time is to drill a hole from the Cats' Lair to the Acid lake, allowing the acid to flow in and eat away at the lair. The Thundercats set out to find the one substance that neutralizes the acid.
Elenco: Bob McFadden , Larry Kenney , Earl Hammond , Lynne Lipton , Earle Hyman , Peter Newman , Gerrianne Raphael , Doug Preis , Will Friedle , Emmanuelle Chriqui , Kevin Michael Richardson , Matthew Mercer .