Alien is a sci-fi horror film franchise first started in 1979. The first movie is set in a retro-future setting aboard a spaceship known as the Nostromo. En route to return to earth, the crew of the Nostromo investigates a distress signal from a derelict spaceship. When the investigation leads to a strange alien discovery, the crew's lives are jeopardized as the new, unknown life form hunts them relentlessly.