Surprisingly good B sci-fi. John Agar and Hugh Beaumont star as archaeologists who gets trapped in a world below the Earth's crust. They discover two intelligent species there, a race of Albinos apparently descended from Sumerians and the mole people. The mole people are initially the scarier race, with their ugliness and their big claws, but the superstitious, ultra-religious ways of the albinos prove more threatening in the long run. The script is fairly intelligent, and anticipates Planet of the Apes in many ways. Yes, the B-movie production level is at times risible, and the ending is very odd  read IMDb's trivia section for an explanation (though avoid it if you haven't seen the film, as the one piece of trivia is an enormous spoiler)  but otherwise it's a fine movie. I was racking my brains to understand why it was rated so low  only 4.4  then I figured it out: it was featured on Mystery Science Theater 3000. That show really is a bane to real movie lovers. So far, this is the only film in Best Buy's sci-fi set that I've really liked besides The Incredible Shrinking Man.