 SPOILER: There are at least three major drafts of the screenplay.  While they all have the same storyline, many details differ between  them. The first draft, dated July 24, 1980, was written by  Hampton Fancher (qv) alone. It refers to replicants as "androids"  and makes it clear that Deckard is human; at one point, he has a  physical, hoping to qualify for an off