Continuity mistake: During the fight between A no 1,and Shack. Shack is cut with the ax, the ax head is coated with "blood," as A no 1 is setting up for another swing you can see the ax head behind his head, it is still "bloody," but as he starts the swing, the ax head is shiny and clean, and then it's bloody again.
Continuity mistake: Shortly before Sol's death, Thorn rushes into the suicide center and talks to him from the control room above. When Sol pleads Thorn to listen, there's interference on the intercom. Now watch the control panel: The earphone cable on the left side dangles back and forth each time the "speaking permitted" sign flashes on and off, blatantly revealing the cheap trick they used to make the display flashing - they simply toggled the "on" and "off" frames. (01:17:30)
Continuity mistake: In the scene where Eastwood is watching "the city of Lago volunteers" training,he is drinking a beer. The first time he lifts the glass to drink, it is about half empty. After he says something to the man with the knife, he lifts the glass for another drink and it is nearly full.
Continuity mistake: Trixie Delight's room number in the hotel is 235, but when Imogene and Addie go to Addie's hotel room, which is right next to Trixie's, the number on the door says 235, too.
Continuity mistake: When Jack goes to the surgery to take his pleasure with the nurse, he chalks on the blackboard on the door that the nurse will be unavailable for 30 minutes. When Blakey arrives, the 30 minutes note has gone from the blackboard. But when Blakey opens the door with his passkey, the 30 minutes note has re-appeared on the door.
Continuity mistake: In the scene before the king and servant story, the people throw a lot of junk on one of the followers. If you look closely, you can see the accordion used in the scene before piled on him twice.
Continuity mistake: As the blue sedan turns onto the street where the children are playing, the street is entirely in shade. But after the children begin reacting, the car approaches in full sunlight. (00:56:20)
Continuity mistake: At the beginning of the scene in which Diane Keaton rides on Woody Allen's back across the water, she is wearing clunky platform shoes. Later in the scene, her shoes have inexplicably changed to Keds-style tennis shoes. At the beginning of the next scene, she is wearing the platform shoes again.
Continuity mistake: When Chino ambushes Morrel's men in the mountains he is waiting on a pointy rock. When the camera angle changes there are bushes behind him that weren't there before. (01:27:05)
Continuity mistake: In the scene where the inmate is being beheaded in the courtyard, as they change shots for the special effect you can now see that the sun has moved and is glaring into the camera lens and the executioner is now visible standing next to the guillotine.
Continuity mistake: During entire scene with dancing king Herod and his men, shadows on the floor are at different angles from one shot to another. (01:16:15 - 01:19:30)
Continuity mistake: When Serpico finds three black men raping a girl in the park, one of them cuts the girls face slightly and the cut is very visible. The camera then cuts away then back and the cut and blood is gone. (00:10:25)
Continuity mistake: There is a scene which is supposed to take place either on or about the day Kennedy was assassinated, where a boy is delivering newspapers. The newspapers have the infamous "Wanted for Treason" handbill wrapped around them. The handbill was distributed on the streets of Dallas and not as part of any newspaper.
Continuity mistake: Inspector Lebel's level of grey hair colour varies quite markedly back and forth during the movie.
Continuity mistake: Towards the end of the film when "Molly" is chasing Varrick's aircraft, the front fenders of his car have miraculously repaired themselves having been stoved in earlier when he crashed into various other cars in the scrapyard as he first went for the kill.
Continuity mistake: The driver of a carriage is racing along a road during a rain storm. In long shot, it is pouring buckets & buckets of water. Close-up of the driver & it is a light rain. Back to long shot, buckets again. Close-up, light rain.
Continuity mistake: In the scene where Ka and Bee jump over the "wall" towards the end after attaching the bomb to the boat, they have nothing on their backs; but when they jump into the water, the 'holder' of the bomb is seen on their backs again and the woman takes it off then.
Continuity mistake: During one of the pool scenes, balls disappear and change position between cuts.
Continuity mistake: At the start of the movie the train pulls into town. The loco, tender and 2 stock wagons pass the water tower, but the next shot shows the loco still alongside the water tower.
Continuity mistake: During the first gunfight between The Gunslinger (Yul Brynner) and Peter (Richard Benjamin), The Gunslinger is seen being shot in the middle of the body from the back. But, when you see him a second or two later, the shot is well over on his right side.