Netflix has been bulking up its sci-fi category lately, with recent additions like Jurassic World Rebirth with Scarlett Johansson and A Quiet Place: Day One with Lupita Nyong’o delighting genre fans. The streamer continues to prioritize sci-fi, adding a slew of titles in September, including two classics that rank among the best films ever made. Alien introduced the world to Sigourney Weaver’s Ripley and made the actress both a worldwide star and an icon of the genre. That film’s massively successful sequel, Aliens, established James Cameron as an A-list director, introduce...