I enjoyed this episode very much. I could visualize the scenes as they were climbing and crawling through the vents and it being dark and then sliding back into the same room that they were fleeing from. There was a movie I am thinking in the 50's or60's where a group of people are trapped in a cave or bomb shelter from a war time explosion which sealed them in. They are able to survive inside but are desperately trying to get out. They didg a tunnel trying to escape and when they begin to see light for their efforts only to find out they had tunneled into another part of the same cave that kept them captive. This reminded me of that movie. The point of the epsideo has been doen a lot remember the movie The Abyss... you better straitghten up humanity and be nice to one another or the aliens will exterminate you message. Overall a very enjoyable episode... please check it out you all and tell us your thoughts on this thread!