Giant Gila monster

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After a couple of teenagers go missing in a small Texas town, everyone assumes they've run off to the big city. But, when their bodies are found in a nearby creek, the sheriff (Fred Graham) is puzzled as to what could have killed them. Chase Winstead (Don Sullivan), the leader of a local hot rod group, agrees to help the sheriff, and together they discover evidence of a giant lizard roaming the desert. Soon the lizard is terrorizing the town, and only Chase can stop it before it's too late.