BRmovie.com: Blade Runner Souvenir Magazine - Official Collector's Edition

Above: Zhora attacks Deckard in her dressing room at the snake bar after she realizes he is hunting Off-World replicants.

Above: Deckard leaps on top of the bumper-to-bumper vehicles in pursuit of Zhora, as a weird assortment of street people walk by.

Essentially it was one man in search of four characters in this massive megalopolis. It is a spooky idea, worse than a needle in a haystack when you're looking for four people in a city of millions of people. In fact, it's nearly impossible.
- RIDLEY SCOTT