Mistakes in Blade Runner

Mistake #1

Deckard (Harrison Ford) investigates the maker of artificial reptiles; an Abdul somebody. It's obvious that the dialogue was added as neither actor is in sync with the sound. The end of the scene has the storekeepers voice telling Deckard the information he was seeking while Deckard's mouth is the one moving. Deckard's mouth continues to move even after Abdul's lines are finished and the scene cuts.

Mistake #2

When Deckard visits the Tyrell Corporation, he prepares to test Rachel with the "VK" machine. He is shown putting his briefcase of the table and lifting the "VK" machine out and onto the table. If you look closely, the "VK" machine is already on the table and Harrison Ford is miming the lifting - there is nothing in his hands!

Mistake #3

As Deckard (Harrison Ford) stalks Batty (Rutger Hauer) in the building at the end, you see him walk through a room and briefly the shadow of two crew members (one is the director Ridley Scott) skims across the wall.

Mistake #4

When Decker shoots the snake-woman replicant, she hits the glass and in one shot you can clearly see that is not the actress that hits the glass, but a stuntperson dressed like her. This has been corrected in the 2007 Final Cut of the film, but exists in all previous versions.

Mistake #5

At the start, Bryant mentions that 'six skin jobs' escaped and that one got fried trying to get into the Tyrell building. Deckard kills four, so what happened to the last one? [It's been suggested that Deckard himself is the last one, but there's so much debate surrounding it I'll leave it in as a mistake and you can make up your own minds]