Ben had his "Road to Damascus" moment for Blade Runner after multiple viewings.

Major Versions

1. Workprint: early mishmash, no opening crawl, no voiceover, no unicorn dream, no happy ending
2. Theatrical release: opening crawl, voiceover, no unicorn dream, happy ending with unused footage filmed for The Shining
3. Director's Cut: opening crawl, no voiceover, unicorn dream
4. Final Cut: Director's Cut with improved special effects, additional violence and alternate edits from international cut, completely new scenes

Harrison Ford hated the voiceovers; he read them badly so they wouldn't be used. But they were.

Marlon Brando once peed his pants to force a scene redo.

Ridley Scott says Deckard is a replicant; Harrison Ford says he isn't.

At the end, Deckard and Rachel are in the same position that Roy and Priss were during the film.