The scientists examine the arm, concluding that the alien is an advanced form of plant life. Carrington is convinced of its superiority to humans and becomes intent on communicating with it. The airmen begin a search, which leads to the outpost's greenhouse. Carrington stays behind with Vorhees, Stern, and Laurence, having noticed evidence of alien activity. They discover a third sled dog hidden away, which has had all of its blood drained; the carnivorous plant creature feeds on blood. Carrington and the scientists post a secret watch of their own, hoping to encounter the alien before the airmen find it.