Parker intervenes and knocks off Ash’s head, revealing him to be an android.Parker reanimates Ash’s head, and Ripley interrogates him.Accessing Mother, Ripley discovers that Ash has secretly been ordered to return the alien to the crew’s employers, who consider the crew expendable.When Ripley confronts Ash, he tries to choke her to death.The crew are unable to remove the creature from Kane’s face, as its grip is strong and its blood is an extremely corrosive acid. Since attacking the creature with conventional weapons could result in its corrosive blood breaching the ship’s hull, the crew attempts to locate and capture it with motion trackers, nets, electric prods, and flamethrowers.Brett is sent to look for the crew’s cat, Jones, and the now fully grown alien attacks him and disappears with his body into the air shafts.Following standard company policy for such situations, the Nostromo lands on the planetoid and Dallas, Kane, and Lambert head out to investigate, damaging their ship upon landing in dust.
She propels it into space by shooting it with a grappling hook, but the gun catches in the closing door, tethering the alien to the shuttle.
Ripley activates the engines, blasting the alien into space.
After recording the ship’s final log entry, she places herself and Jones into stasis for the voyage home.
After a heated discussion, the group devises a plan to jettison the creature out of the ship.
Dallas enters the Nostromo’s labyrinthine ventilation shafts, intending to force the alien into an airlock, but it ambushes him.
She narrowly escapes in the shuttle as the Nostromo explodes.