Brace yourself for a shivery good time with this duo of classic sci-fi flicks. In Tarantula, a lab experiment gone horribly awry creates a massive spider that satiates its bloodlust with cattle -- before moving on to human beings; then, in The Mole People, a team of archeologists on a quest to find a lost race instead discover a horrific tribe of people living underground who have brutally enslaved the creepy half-human mole people.

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