chunk: 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. 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. 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.