The cult film series TREMORS continues with this prequel that examines the origins of the giant killer worms from the three previous episodes. Series regular Michael Gross returns for another starring turn, this time as the ancestor of the character he plays in the other TREMORS films. It's late-1800s Nevada, and the site of a valuable silver mine is rapidly becoming a ghost town after a slew of miners fall victim to mysterious homicidal creatures. Enter the mine's owner, effete aristocrat Hiram Gummer (Gross), who hires a gun-toting mercenary, Black Hand Kelly (B-movie stalwart Billy Drago), to deal with the profit-stifling interlopers. But when the killers turn out to be something other than human, Gummer and the town's few remaining citizens must prepare for a terrifying showdown of supernatural proportions. Eschewing CGI for more primitive animation techniques, TREMORS 4 revels in its low-budget appeal and resurrects the blackly comic tone of the original.