Dan O'Bannon

Dan O'Bannon was a movie screenwriter best known for writing the script for the 1979 film Alien. Dan O'Bannon's original script treatment for Alien did not include the character of Science Officier Ash. Producers Walter Hill and Ronald Shusett felt that the film needed a secondary story element, so they added the sub-plot of Ash, the android spy who ultimately betrays the crew. O'Bannon was displeased with this, feeling that it was a cheap gag and disingenuous to his original vision. He referred to the new material as suffering from "Russian Spy" syndrome.