Archaeology is a dangerous business, as we discover the hard way in this latest episode where we are taken deep into the catacombs underneath Rome. Donald Pleasence's Professor Lasky leads a well-funded but under-staffed dig to find a two thousand-year-old tomb which may or may not be evil. It is evil, and something nebulous is unleashed with the power to do whatever the special effects budget will allow. How can it be stopped?

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