Reading the blog of one reviewer made me smile. He says that when this was transfezred to video tape, it lost much of its contrast, making some scenes in the cave very dark. PRC was notorious for not spending money and that included proper lighting. Like its counterpart, Monogram, some scenes were lit only by a candle or overhead light. The actors were usually rank amateurs at best, except for one main actor like George Zucco. He was able to get by with a few expressions and dramatic readings. This horror film no doubt once saw the light of day on the sceen of a third run movie house on a side street. The patrons there were not looking for high class entertainment. usually just a place to flop and take a nap. If the moms of yesteryear knew where their little darlings were going on Saturday or what they were going to see (they had no movie ratings in those days) they would have probably kept them home. This is why these films found popularity on early television. You could watch them in the safety of your livingroom.