Lambert, realizing the alien is killing the crew one by one, implores the others to escape in the ship’s shuttle.
Now in command, Ripley explains that the shuttle will not support four people, and recommends that they continue with Dallas’ plan of flushing the alien out.
As he inspects one, a creature springs out, spits acid through his space helmet and attaches itself to his face.
Ripley, Lambert and Parker agree to set the Nostromo to self-destruct and escape in the shuttle.
However, Parker and Lambert are ambushed and killed by the alien while gathering life-support supplies.
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.