Alien is a 1979 science-fiction horror film directed by Ridley Scott and written by Dan O'Bannon. Based on a story by O'Bannon and Ronald Shusett, it follows the crew of the commercial space tug Nostromo, who encounter the eponymous Alien, a deadly and aggressive extraterrestrial set loose on the ship.
The Alien and its accompanying artifacts were designed by the Swiss artist H. R. Giger, while concept artists Ron Cobb and Chris Foss designed the more human settings.
The success of Alien spawned a media franchise of films, novels, comic books, video games, and toys. It also launched Weaver's acting career, providing her with her first lead role. The story of her character's encounters with the Alien creatures became the thematic and narrative core of the sequels Aliens (1986), Alien 3 (1992), and Alien Resurrection (1997). A crossover with the Predator franchise produced the Alien vs. Predator films, which includes Alien vs. Predator (2004) and Aliens vs. Predator: Requiem (2007). A prequel series includes Prometheus (2012) and Alien: Covenant (2017), both directed again by Scott.