Continuity mistake: In Faramir's hideout behind the waterfall, Sam tells Frodo, "Use the Ring, Mr Frodo, just this once..." When the camera is on Frodo alone, the camera lighting shines on Frodo's right side, with his left in shadow. When the angle of the camera changes to show both he and Sam, Frodo's left side is then lit. (00:41:00)
Continuity mistake: At the battle of Helm's Deep, after the wall is breached we see the water flow out. Then there is an aerial shot of orcs entering the pool of water. It cuts to a closeup of Aragorn lying on the ground just in front of the pool, a very short distance from the orcs. He should have been visible in the aerial shot.manne
Visible crew/equipment: When the wounded Aragorn gets up on Brego the next shot shows him ride towards the sun, and his shadow behind him. The same thing goes for the camera crews shadow (you may have to play it in slow motion in order to see the large shadow). The shadow of the crew is seen at the very beginning of this shot. And there are no rocks beside the camera because the camera moves 180 degrees to show open terrain.
Continuity mistake: When Faramir and his Lieutenant are looking at the map, just after it's been unfolded, the Lieutenant puts his right hand out and points on the map with his right hand. In the following close-up, his left hand is doing the pointing on the map. All the close-up shots of the map were added later during pickups, to show more clearly where various characters are. (00:27:55)Super Grover
Continuity mistake: When Sam, Frodo and Gollum are watching the Haradrim and Oliphaunts from the hill, the sun is shining on the left side of Frodo's face and on the right side of Gollum's face. In fact, throughout the sequence, the sun's position seems to change quite a bit, even though the scene only lasts a few seconds. (01:18:20)
Deliberate mistake: During Theoden's attack, Arwen on a white horse is visible in about 3 frames. It was confirmed on the Commentary that Arwen took part in the Helm's Deep scenes as originally filmed, but was cut from them later, but apparently not completely, because she is seen in a number of shots. During the beginning of the attack, when the riders are still in the fortress, several shots end abruptly when only the white horse (different from Arod, its head is not covered with protection) is visible and not the rider. She is also seen riding down the causeway, in front of Legolas. Her hair was colored blonde, her body and clothing were shaded and colored green, to disguise her. (01:28:40)
Continuity mistake: When Gamling is fighting the Warg scout, after Hama's death, Legolas jumps off the high rocks, and starts running towards the Orc. There are high rock ridges behind and to the left of Legolas. As soon as the Orc scout falls to the ground, in the next shot of Legolas, as he runs toward the Orc, that background is flat and there is only one rock ridge directly behind Legolas. (00:09:00)Super Grover
Continuity mistake: Gimli yells, "Aragorn!" then as he jumps into the air, on that same wall, is a dead body hanging over the edge, next to the smoldering lantern. In the earlier shot, just before Aragorn lifts his head down below, as the camera panned over the Deeping Wall, there was no dead body lying at the top near the edge, next to a smoldering lantern. (01:10:20)Super Grover
Deliberate mistake: As Aragorn, Legolas and Gimli gear up for the battle of Helm's Deep in the Keep, Gimli puts on chainmail. After he says it's too tight in the chest, you see a back shot of Gimli standing facing Aragorn and Legolas. This man is obviously a scale double, as the body and posture are wrong.
Continuity mistake: At Edoras, as Éowyn says, "Now the Wildmen are moving through the Westfold, burning as they go, rick, cot and tree," Aragorn and Gimli sit at a table across the room. In this shot, the candle on their table has drippings going down the side of the candle. When Aragorn says, "You have two thousand good men..." the candle is taller and does not have those drippings. Aragorn says, "Open war is upon you..." and the candle now has more drippings than in that first shot. (01:27:35)Super Grover
Revealing mistake: When Theoden says, "They will break upon this fortress like water on rock," the camera is in a crane shot which slowly creeps up, becoming a medium close-up of Aragorn. As the camera flies over the front wall of Helm's Deep in the shot where Theoden delivers his line, look down into the deepest level of the castle towards the left of the screen. Rohan citizens are bustling and moving. If you watch closely, you can see the lowest level of the castle jump and shake in the shot. This is because that lowest level wasn't there in reality and it was added in the computer. (Probably can be seen only in the Widescreen version).
Continuity mistake: In the extended edition of The Two Towers, during the 'Elvish Rope' scene near the beginning, the mist disappears and reappears between shots. When Frodo falls and lands at the bottom of the ravine, there is lots of thick, white mist swirling around, but when it cuts to a wider shot, it has nearly all disappeared within a second. In the next close-up shot of Frodo, it has reappeared again.JBrock
Audio problem: When Gollum starts leading the hobbits, just after they let him go, he slips slightly on one slope and there is a sound of stones sliding down. But no stones are dislodged.
Other mistake: In this scene, Legolas says, "The Uruks turn Northeast. They're taking the Hobbits to Isengard." This is a mistake because Aragorn, Gimli, and Legolas are chasing the Uruks on a westerly course towards Isengard. If the Uruks had turned Northeast, they would have almost doubled back on the trio. (This is in the "Special Extended Edition" DVD.) The Uruks were taking the closest way to Isengard, across terrain, not traveling by common roads. In the book they traveled without rest. There's no reason to believe they would have diverted from their Western course to Northeast temporarily, that would have slowed them down. (00:19:00)
Character mistake: When the Rohirrim are preparing for the Helm's Deep battle, a man is shown sharpening a sword on a grindstone. He is doing it wrong, but it is the way that most people think is the right way. The stone should be spinning so that the blade is "shaving" it, even though that seems like it would dull the edge.