At the Earth's Core | Adventure, Fantasy, Sci-Fi | 1976  | 89 min | Kevin Connor | Edgar Rice Burroughs, Milton Subotsky | Doug McClure, Peter Cushing, Caroline Munro | A Victorian era scientist and his assistant take a test run in their Iron Mole drilling machine and end up in a strange underground labyrinth ruled by a species of giant telepathic bird and full of prehistoric monsters and cavemen.  | PG