Masterpiece of the Z grade fantasy genre. I'm serious as well, I mean don't get me wrong, if you haven't got a bent for this type of Z grade, creaky creature feature (why would you be watching is my first thought?) then it's most likely a rating of about 4 to 5 out of 10 tops, but to me it's a special kind of nonsense that takes me back to a nice time in my childhood. You know the kind, where the memories have never left you. Eagerly taking it all in with youthful wonderment as Doug McClure and Peter Cushing tunnel beneath the mantle to do battle with a host of creatures and sub-human speci...