Watched the first two episodes. It looks to slot into the timeframe right around the original movie, but before Aliens. It adds new elements that were not in the films, yet they've worked it in fairly well. It is not fully expanded yet, so not sure how all of it fits in, but so far I feel the show is good. They've added elements beyond just the Alien and in one review that I saw, it said "NEW nightmare fuel for you to think about when you are alone at home." Ridley Scott is the executive producer and he said he enjoyed what they've done with it.