Ash (Alien)

Ash is a character and the secondary antagonist in the movie Alien. He is portrayed by Ian Holm.

He is the science officer of the Nostromo, who breaks quarantine by allowing Kane, a member of the crew, back on board after he has been infected by an alien life f orm. It is later discovered that Ash is not human at all, as he appears, but is in fact a Hyperdyne Systems 120-A/2 android, who is acting upon secret orders to "Bring back alien life form. Crew expendable."