Crackpot scientist believes mankind is doomed by the Atomic Age, and finding its best hope for survival lies inside the hollow earth, mounts an expedition there with a tunneling machine that looks like the unholy offspring of a Studebaker and a Dremel tool.

One of those irritating films where a narrator drones on and on explaining what's happening, instead of just letting the actors act. When they do get to act, all they do is argue, for reasons as ill-defined as their characters.

Well intentioned, but trite and pretty much pointless, typical of many early sci-fi films.