The Ending Of Blade Runner Explained

It's the question that Blade Runner fans have been asking since the film first came out in 1982 -- is Rick Deckard a replicant? The sci-fi neo-noir sees Rick Deckard (Harrison Ford) hunting down replicants -- androids who act extremely human -- in a futuristic Los Angeles, but people have been wondering for years if the film's ending is trying to tell us that Deckard is actually a replicant himself.