Let's start off by saying that this is the pits, the dregs, the bottom of the barrel. All of us who love the 50's (and early 60's) sci-fi, low budget films are usually prepared for bad acting, bad monsters, cheesy sets, etc....but even when these films are bad, they're good 'cause they are fun. Not this one! The actors(?) talk, and talk, and talk, hide behind doors and in freezers that don't seem to be cold and then talk some more. A little love interest is thrown in to spice up the action.....spare me! To top it off, the "fog" is so thick that you cannot distinguish the actors(?) from the slime monsters, which may be a good thing. What was Robert Hutton thinking?.....bless his heart, he had some excellent roles in the 40's in first run features and then seemed to go to Hell in a handbasket. This has to be the nadir of his career. And Les Tremayne must have needed work badly to appear in this mess, albeit rather briefly, carrying a goat (what was that about?) The story line is sketchy at best....slime people who have lived under Los Angeles forever, carry spears, come to the surface and produce fog to lower the temperature and build a wall around the city and..........whatever! MST3K did a good job with this but remember, this film was supposed to be taken seriously. Do you think that Mr. Hutton was dropping acid when he made this.......you may have to do a couple of tabs yourself to get through this bomb.