First off, this story is loaded with scientific inaccuracies, the acting is somewhat inconsistent and the premise itself is rather preposterous. However, I found this film addictive and have watched it on a reasonably regular basis. You have a group of people, who decide that the threat of human annihilation is SO likely, it's worth the expense and risk to seek refuge deep in the bowels of the earth. This is all explained in detail in a rather convincing faux newsreel that immediately follows the opening credits. Soon, our less than harmonious crew of seven is locked together in the confines of a tunneling vehicle (called a Cyclotram) headed deep into the earth's interior completely cut off from civilization. There was animosity among some members to begin with, and now stuck together in the not–so-roomy vehicle, patience is predictably thin. Although, the science is off, the crew encounters adversities that are more realistic then most movies of this type. Such things as water shortages, UN-breathable pockets of gas, falling, boiling hot steam and indeed separation from humanity are the enemies they face. This isn't "action adventure" type science fiction, it's more drama based. Don't look for giant lizards or monsters. What makes this movie work for me is its overall dark mood. The dim photography, the music, the character's overall moods and the almost complete lack of any indigenous animal life creates a very melancholy atmosphere. I think the film does an excellent job of conveying the crew's loneliness and uncertainty. It's low budget only intensifies the somber feel. The crew even has a conversation about how their moods are changing (apparently from isolation). Because of all this, when they do discover something that seems to bring a little hope, you almost share their sense of invigoration. I wish this film would get a remastering and a decent release. Ironically the VHS version is far superior to the present DVD. For instance, the DVD is missing the first 12 seconds of the opening credits, including the entire "Lippert Pictures, Inc. Presents" and a bit of the title shot. Also the film is so poorly cropped that Marilyn Nash's name lies almost out of sight hidden the the bottom of the frame. Letters are also cropped off at the right. The newsreel has so many breaks that quite a few of the announcer's words are cut out. If you still own a VCR, it's actually worth picking up a VHS copy. You'd notice that on VHS the credits and newsreel are very much intact and the whole movie is a much better viewing experience.
