The pilot that David Lynch originally set out to film, dealt with mysteriously recombined incidents of nearing mystic proportions, united chiefly by their common situs, Mulholland Drive.  It deals with the stuff from which ghost stories are bandied in American folklore.  Most of us have already heard of ghost stories quite similar to the passages unfolding in Mulholland Drive, most of them involving ghosts that have to revisit a tragedy from which they cannot escape, but are condemned to experience, time and time again.  David Lynch clearly achieved a miracle wrapping up as many loose ends as he could, considering the vast amount of footage already shot, and the need to shoot a little bit more to finish it all off.