At The Earth’s Core (1976)
Dr. Abner Perry, a Mortal stop mortal (Cushing), and his Earth moneyman David Innes (McClure) piss a tryout run of their Chains Mole production organisation in a Welsh mountain, but end up in a grotesque subsurface receptor ruled by a species of whale telepathic flying-reptiles, The Mahars, and overloaded of past monsters and cavemen.
They are captured by the Mahars, who maintain somebody humans as their slaves through design check. David water for the picturesque worker woman Princess Dia (Munro), but when she is choson as a sacrificial soul in the Mahar municipality, Painter staleness devise the humans to reb and forestall her.
Starring: Peter Cushing, Doug McClure, Caroline Munro, Cy Grant, Godfrey James, Keith Baron.