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.
Production Details
An Amicus Production
Produced at
Pinewood Studios, Iver Heath, Buckinghamshire, England, UK
89 Mins
Stills from film
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Hammer Connections
Original Poster
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Footnotes
Actor/stuntman Bobby Parr lost a finger during a fight sequence with Doug McClure that went wrong.