Directed by RiffTrax regular Fred Olen Ray, the film assembles an eclectic feast featuring cannibalistic cave monsters, Ross Hagen as a shambling knockoff of Indiana Jones, Jeffrey Combs of Re-Animator playing “the cute one”, re-used dinosaur footage from Planet of Dinosaurs, re-used Robby the Robot from Forbidden Planet playing A Different Robot, and even a re-used prop from Mel Brooks’ History of the World, Part 1. And naturally, there is a scantily clad alien queen with a sword, and a scantily clad cave babe doing scantily clad cave babe things. After a cave monster ruins a perfectly nice picnic by pulling a guy’s head right off, it’s discovered that these cave creeps are sitting on a motherlode of valuable jewels. So naturally, an expedition of losers is assembled to go underground and “reclaim” them. But first they’ll have to survive a lot of cave exploration and seemingly unrelated encounters with aliens, robots, and dinosaurs.