Feature Movie (19 Jan 90) Tremors
Video (9 Apr 96) Tremors II: Aftershocks
The only regular character remaining from the previous movies is Burt Gummer, the gun nut. It has been 11 years since the Graboids were wiped out in Prefection valley, Nevada. A young entrepreneur is running fake Graboid safaris. Predictably, a real Graboid turns up.
Back in the days of the Wild west, Burt Gummer's ancestor (who looks just like him) bought a silver mine. Naturally, the mine was in a remote valley in Nevada. And when he tries to re-open the mine, graboids start to eat people. The answer is to hire gunslinger Billy Drago ( Vamp ).
This does not entirely fit as a prequel. Wasn't Burt a survivalist as a response to his time in the Big City? How come he never knew about his ancestor's encounters with the graboids? And of course, this precludes the Mixmaster origin story from the TV show.
Perfection, Nevada, is a Federal Wildlife sanctuary to protect the Graboids - an endangered species. The only regular character remaining from the movies is Burt Gummer, the gun nut. A handful of other locals are still in town, including farm-hand Branscombe Richmond (Renegade).
The locals investigate an old mine shaft. There may be a secret lab hidden there/.
Christopher Lloyd, best known as the mad scientist in the Back To The Future Series, guest-stars.
An Assblaster arrives. Harrison Page [Sledge Hammer] tries to capture it.
Bert holds his first class - he has his own Survival school!
Michael Rooker ( Mallrats ) hires Nicholas Turturo to go to Las Vegas. A Graboid Tour arrives - and we learn that the town's Latino babe has a dodgy Las Vegas background!
The team must save El Blanco from gangsters.
This introduces Cletus [Christopher Lloyd - Back To The Future ] and provides exposition on his backstory [a secret lab produced mixmaster for a Megacorp]. There's a new monster on the loose.
Branscombe Richmond guest-stars again.
There are hippies and monkey wrenchers in the valley to protest about El Blanco's condition. He's dying, apparently.
Burt and the newbie are conscripted by the US Govt to save an Arizona town from Shriekers.