This is a very theoretic documentary, that aired on The History Channel. It deals with the possibility of a Black Hole in the Earth. We are explained what such is, as a space phenomena, and then they go into the interesting concept that is the basis of this program. It's a pretty big, forehead-slapping "oh, of course" moment when you find out what they mean by the idea. That is part of the reason I'm not putting it here. This features interviews with specialists within several fields, some actual, real-life footage from many different sources and times, as well as graphics and more. It ran at an hour total, so without commercials, it's 42 minutes, give or take a couple, from start to finish of the production. This may very well provide food for thought, for those who want to know about the subject. There isn't particularly anything offensive in this, in fact, unless the thoughts expressed bother the viewer, there is nothing that qualifies. I recommend this to anyone that wishes to find out all regarding this. 7/10