Corrected entry: In the scene where Deckard and Batty are hunting each other down at Sebastian's residence Batty calls Deckard by his name after asking "are you the good man". There is no point previous in the movie where Roy would have been given the police man's name.
Damian Torres
1st Sep 2007
Correction: Deckard has a reputation of being the best Blade Runner there is. Not hard to imagine Batty and his gang hearing about him from somebody and correctly assuming at the end of the movie that he is the man hunting them down.
Damian Torres