https://en.wikipedia.org/wiki/Blade_Runner#Versions
The 1982 US theatrical version released by the studio included the "happy ending" as well as the addition of Harrison Ford's voiceover. https://en.wikipedia.org/wiki/Versions_of_Blade_Runner#US_theatrical_release_(1982)
https://en.wikipedia.org/wiki/Versions_of_Blade_Runner#The_Director's_Cut_(1992)
https://en.wikipedia.org/wiki/Versions_of_Blade_Runner#The_Final_Cut_(2007)
