This book of essays looks at the multitude of texts and influences which converge in Ridley Scott's film "Blade Runner, " especially the film's relationship to its source novel, Philip K. Dick's "Do Androids Dream of Electric Sheep?" Essays consider political, moral and technological issues raised by the film, as well as literary, filmic, technical and aesthetic questions. Contributors discuss the film's psychological and mythic patterns, importance political issues and the roots of the film in "Paradise Lost, " "Frankenstein, " detective fiction, and previous science fiction cinema.