Director Ridley Scott returns to a world he’s helped shape for over four decades with HBO Max’s “Raised by Wolves.” It’s not just that the director of “Alien” and “Blade Runner” is putting his name on science fiction again by directing the premiere episode of this series, but he is back at play in the deeply philosophical regions of the genre, one that seeks to define that which separates man and machine. In the legacy of Ash, Roy Batty, and David from “Prometheus” and “Alien: Covenant,” Scott now adds the story of Father and Mother, androids designed to do something truly human: raise and sustain life. Created by Aaron Guzikowski (“Prisoners”), “Raised by Wolves” is at its best when it allows Scott and the directors that follow him to dig into the issues, but it lacks in departments like storytelling, mythology, and world-building. It feels like a sketch for a show, waiting to come together into something denser and more engaging. It may be an intriguing sketch, but how long will viewers be patient if it’s not colored in?