Audio problem: 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.

Other: 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!

Visible crew/equipment: 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.

Continuity: 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.

Continuity: 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]

Audio problem: In one of the scenes at A.J's house, A.J is talking to Batty and Pris. Batty is sitting down and starts talking about A.J's chess game. Batty says "your opponent" then A.J says "Oh, Dr Tyrell" while he says this the chess game is shown, then it cuts to Batty and A.J and he continues "I've only beaten him once at chess." For this line his lips are not moving.

Visible crew/equipment: Near the beginning of the film when Deckard and the other cop take off in the car to go to the police station, you can see the cables lifting the car up into the air.

Revealing: After the snake lady is dead, eyes open, Deckard rolls her head from camera right to camera left. Her eyes move.

Continuity: When Zhora attacks Deckard, she isn't wearing any lipstick. After she is killed and they roll her over, she has bright red lipstick on.

Continuity: The dialogue between Holden and Leon in the beginning never matches the interrogation tapes during the films (excluding Deckard's recall a moment before he confronts Pris). Most notable are the time and speaking manner. It can be heard when Deckard and Bryant listen to the tape.

Revealing: When Leon and Deckard are fighting in the street, Leon swings at Deckard and puts a hole through a steel vessel where steam blasts out. It's clear that the spot where Leon hits has been cut out and is visible before he hits it.

Continuity: When Deckard shoots the snake-woman in the back and she falls through several layers of glass she lands on her stomach, with her head lying on the left side. In the next scene Deckard is standing beside her, but now she has turned her head, lying on the other cheek.

Continuity: When we first see Bryant in a slow pan down, he is reading a page of paper. We then have a shot of Deckard walking through the door, then we see Bryant "suddenly" with his hands crossed and his demeanor suddenly changes to an interview pose.

Other: When Batty is in the phone booth shaking his hand, the nail stuck in his hand at the end of the movie is seen as he turns his hand. Also, someone's hand is visible on his right sholder.

Continuity: When Rachel is playing the piano, the shade of her lipstick changes when she lets her hair down and again in subsequent shots. It goes from bright red to almost none at all when she kisses Deckard.

Continuity: When Roy throws Deckard to the ground after having rescued him, Deckard's shirt has ridden halfway up his torso, but when the shot cuts to behind Roy, the shirt is down.

Continuity: When Leon goes to sit down for his test, he appears to be wearing a name tag that is attached to the left breast of his outfit. Once he sits down, you only see the printing on the shirt.

Revealing: As Zhora is crashing through the last window, after being shot by Deckard, there are dark pads visible around her lower arms. In few shots before, these are visible whilst crashing, but not whilst she is running or falling.(US theatricalcal version).

Revealing: When Zhora dresses in Taffy Lewis' club she puts on high-heels. Later during the chase scene and when she flies thru the windows, she is wearing normal boots. And when she is shot the second time, her right hand holds a control, probably for the blood bags on her back.

Other: When the woman puts the snake scale under the microscope she doesn't take it out of the bag. She turns on a monitor to view the image; the image when shown is on a different monitor (you can tell by the controls to the right of the image). The image is not a snake scale, it is a marijuana leaf from the Sharf book (his book is in the ending credits).