They learn he was assigned to the Nostromo to convince the crew to capture the creature and return it for analysis, even at the expense of the human personnel.
After recording the ship’s final log entry, she places herself and Jones into stasis for the voyage home.
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 violates protocol by overriding Ripley’s lock and letting them in. Kane awakens and seems healthy, but during the crew’s final meal before re-entering stasis, he chokes and convulses in pain before a small alien creature bursts from his chest, killing him, and escapes into the depths of the ship to molt.
In the alien ship, Kane discovers a chamber containing hundreds of eggs.
As he inspects one, a creature springs out, spits acid through his space helmet and attaches itself to his face.