Experience these two truly terrifying companion chapters in the legendary Alien franchise. In “Alien,” the epic original that started it all, the crew of the space-tug Nostromo responds to a distress signal, only to discover a deadly life form that breeds within human hosts. Then in “Alien: Romulus,” follow the Alien story arc as young colonizers scavenging the deep ends of a derelict space station, come face-to-face with the relentless creature and its offspring. Horror master Fede Alvarez directs “Alien: Romulus” from a screenplay by Alvarez and frequent collaborator Rodo Sayagues based on characters created by Dan O’Bannon and Ronald Shusett. Ridley Scott — who directed the original “Alien” from a screenplay by Bannon — produces with Michael Pruss and Walter Hill.