The "machine" becoming more aware is an interesting concept, probably something the writers may already be looking into. After all, how many episodes of "here's the number, save this person" can we go through. It will get pretty repetitive after a while. Although the show is very well done, sometimes I wonder if the show were truly thought out if they accidentally became successful. Writers may have had ideas for a year or two, not expecting the show to last, but then are suddenly faced with a really good show and now have to somehow work it out to a plausible ending four or five years down the road.