Top 20 Bad Robots

Movie: Alien

Baddest move: Rolled up magazine to the face

Known weaknesses: Can't take a fire extinguisher to the head

Ash a role model for robots corrupted by humans for their own evil ends. He was installed as the science officer aboard the Nostromo by executives of the Weyland-Yutani Corporation, and programmed to bring back a captive facehugger alien from a remote planet, whatever the cost. The crew, he insisted, were expendable. As was he.

Sigourney Weaver's Ellen Ripley caught him out, but before she could alert the crew, Ash rolled up a magazine and tried to shove it down Ripper's throat. Fortunately, Yaphet Kotto and co. turned up in time to hit him over the head with a fire extinguisher.