Giler and Hill revised and made additions to the script; Shusett was executive producer.
The eponymous Alien and its accompanying elements were designed by the Swiss artist H. Giger, while concept artists Ron Cobb and Chris Foss designed the more human aspects of the film.
The film's title refers to a highly aggressive extraterrestrial creature that stalks and attacks the crew of a spaceship.
Dallas and Lambert carry the unconscious Kane back to the Nostromo.
As acting senior officer, Ripley refuses to let them aboard, citing quarantine regulations, but Ash ignores Ripley and lets them in.
Ripley confronts Ash and he tries to choke her to death.
Parker intervenes and clubs Ash, knocking off his head and revealing him to be an android.
Inside, they find the remains of a large alien creature.