Can the dream world be a fully functional parallel reality? Joseph Gordon-Levitt and leading scientists take you to the cutting edge of dream research in this documentary produced for Christopher Nolan's Inception. Can the dream world be a fully functional parallel reality? Joseph Gordon-Levitt and leading scientists take you to the cutting edge of dream research in this documentary produced for Christopher Nolan's Inception. Can the dream world be a fully functional parallel reality? Joseph Gordon-Levitt and leading scientists take you to the cutting edge of dream research in this documentary produced for Christopher Nolan's Inception. Can the dream world be a fully functional parallel reality? Joseph Gordon-Levitt and leading scientists take you to the cutting edge of dream research in this documentary produced for Christopher Nolan's Inception.