The new series from Steven Spielberg, Extant , will debut is just over a month, and The Hollywood Reporter has a list of the five things you need to know : 1. The series will follow a model just like its summer companion Under the Dome, meaning if the show is successful, it would continue on with a second season -- with Berry returning as its lead, producers said. In other words, don't let its billing as an "event" or "limited" series throw you -- this is a cable model 13-episode drama. "We love the idea of season two being the sequel to this," Walker said. "The threat we establish in season one … will continue in season two." 2. The series poses an essential question: "What makes us human? Can machines be human?" showrunner Walker said, noting that what makes us human is as much of a draw to aliens as anything Extant explores. "[This] deals with a lot of familiar themes, and we're rooted in family story." ...