

The Alien was supposed to be more of a sexual predator, and he is hiding in the ship's machinery as Ripley strips and at that point, when he sees her naked, being somehow triggered, he compulsively jumps out at her. Originally, the scene made more sense in terms of the plot. When I saw it, I vowed if I became a director I would never make women shoot scenes like that again". In a recent interview Cameron said "I hated that scene. James Cameron, who directed the sequel Aliens (1986) and who was a big fan of the movie, hated that one scene.

Many critics have commented on the exploitative nature of the scene where Ripley strips down to her underwear, for no real reason plot-wise except to be titillating for the audience, just to be attacked by the Alien once more. Many of these scenes were included in the Director's Cut, which Sir Ridley Scott made at the request of many fans who had seen those scenes as bonus material on the earlier DVD release. The mercy killing scene would eventually be recycled and used in Alien: Resurrection (1997) when an alien/human-hybrid clone of Ripley begs the real Ripley to kill her, to which she does so with a flamethrower. Brett is dead, and covered in maggots Dallas is alive and begs Ripley to kill him. However, the alien is warned by a siren and escapes, but not before it gets injured by a door, and its blood creates a small hole, causing a short decompression. He asks Ripley and Lambert over the comm to open the airlock and flush the Alien into space. An unfinished scene, in which Parker spots the Alien next to an airlock door. Ripley and Lambert discuss whether Ash has sex or not. Alternative death scene for Brett: Ripley and Parker witness Brett (still alive) being lifted from the ground.

A discussion among the crew, immediately following Kane's death, on how to proceed further. An additional conversation between Lambert and Ash, in which Lambert notices a dark patch over Kane's lungs on the scanner, foreshadowing Kane's fate. A scene in which a furious Lambert hits Ripley for her earlier refusal to let her team back aboard the Nostromo. An additional discussion between Parker and Ripley over the comm, concerning the progress on the Nostromo's engines. Extra scenes filmed but not included, due to pacing problems: The crew listens to the eerie signal from the planetoid.
