BLADE RUNNER: All Our Variant Futures, From Workprint To Final Cut.
Documentary highlighting the different cuts of Blade Runner.
From Wikipedia: https://goo.gl/MePdlE
Several different versions of Blade Runner have been shown. The original workprint version (1982, 113 minutes) was shown for audience test previews in Denver and Dallas in March 1982. Negative responses to the previews led to the modifications resulting in the U.S. theatrical version. The workprint was shown as a director's cut without Scott's approval at the Los Angeles Fairfax Theater in May 1990, at an AMPAS showing in April 1991, and in September and October 1991 at the Los Angeles NuArt Theater and the San Francisco Castro Theatre. Positive responses pushed the studio to approve work on an official director's cut. A San Diego Sneak Preview was shown only once, in May 1982, and was almost identical to the U.S. theatrical version but contained three extra scenes not shown in any other version, including the 2007 Final Cut.
Two versions were shown in the film's 1982 theatrical release: the U.S. theatrical version (117 minutes), known as the original version or Domestic Cut, released on Betamax, CED Videodisc and VHS in 1983 and Laserdisc in 1987; and the International Cut (117 minutes), also known as the "Criterion Edition" or "uncut version", which included more violent action scenes than the U.S. version. Although initially unavailable in the U.S., and distributed in Europe and Asia via theatrical and local Warner Home Video Laserdisc releases, it was later released on VHS and Criterion Collection Laserdisc in North America, and re-released in 1992 as a "10th Anniversary Edition".
Scott's Director's Cut (1991, 116 minutes) was made available on VHS and Laserdisc in 1993, and on DVD in 1997. Significant changes from the theatrical version include: the removal of Deckard's voice-over; re-insertion of the unicorn sequence; and removal of the studio-imposed happy ending. Scott provided extensive notes and consultation to Warner Bros. through film preservationist Michael Arick, who was put in charge of creating the Director's Cut. Scott's The Final Cut (2007, 117 minutes) was released by Warner Bros. theatrically on October 5, 2007, and subsequently released on DVD, HD DVD, and Blu-ray Disc in December 2007. This is the only version over which Scott had complete editorial control.
Confused? ^_^ The documentary explains it a little better.