Daniel Thomas "Dan" O'Bannon (September 30, 1946 – December 17, 2009) was an American film screenwriter, director, visual effects supervisor, and occasional actor, usually in the science fiction and horror genres. O'Bannon is best known for having written the screenplay for Alien, adapted from a story he wrote with Ronald Shusett. He also contributed computer animation to Star Wars, worked on cult classics such as Dark Star, Heavy Metal and Total Recall, and both wrote and directed the horror comedy The Return of the Living Dead.