Question: I'm aware that there is debate on whether or not Deckard was a replicant, but as I was watching the movie, I couldn't see any clues as to why anybody would think this. Did I miss something obvious? Why do people think this?
Answer: In addition, if it counts, in the original version of the movie, Bryant says there were 'five skinjobs walking the streets'. Since Baty, Leon, Zhora and Pris only add up to four (and a subsequent scene confirms Bryant wasn't counting Rachel in his first statement), the fan theory that followed was Deckard was the fifth one. Obviously, this has since been rendered null and void as the more recent cuts of the film redub the line to 'four skinjobs'.
Answer: Rachel asks Decker at one point if he had ever taken the replicant test himself, and he doesn't answer. Even though the movie itself doesn't seem to stress the point, in the book on which the movie is based "Do androids Dream of Electric Sheep?", the question of whether the protagonist detective is an android is the main theme.
Question: When Roy and Leon are trying to get answers out of Chew, why does Leon start rubbing eyeballs on Chew's neck and head? (00:30:45)
Answer: Eyes are a major theme in the film and Chew created artificial eyes, one of which is placed on his shoulder as a strange and threatening token of his handiwork.
Answer: In addition, they just ripped Chew's big fluffy coat off him and are placing eyes that have been stored in below-zero coolant on him. Leon was likely using the freezing cold to further put Chew on edge, implying he is completely helpless and at their mercy.
Answer: The two most notable hints are as follows. The first (which is only in the Director's Cut) is that after Deckard dreams of a unicorn, Graf makes an origami unicorn and leaves it at Deckard's apartment. Some people interpret this as suggesting that they're aware of the memories that have been given to Deckard to prevent him realising his true nature. The second hint is that replicant eyes glow in certain lights - at one point in the film, Deckard's eyes can be seen glowing in the same fashion. Ridley Scott has stated on several occasions that, as far as he's concerned, Deckard is a replicant, but he does concede that they deliberately left it as somewhat ambiguous - the viewer should decide for themselves.
Tailkinker ★