Continuity mistake: In the scene where Lex is running in the abandoned whaler camp, the "shield" she is holding keeps changing hand between shots. (01:18:05)
Continuity mistake: Early in the movie the female protagonist "Lex" Woods is climbing an ice waterfall. The scene shown from a distance reveals a steep ascent above the ice, but in the next scene, she reaches a large area flat enough for a helicopter to land upon. (00:03:40)
Continuity mistake: When Lex and the predator are going up the tunnel at the near the end of the movie. Lex has the alien head shield on her left arm. But when they are speeding up the tunnel, the shield is not on either arm. If you pause it, you can see the shield missing. When they emerge out of the tunnel it is back on her arm. (01:17:05)
Suggested correction: The shield didn't vanish. Lex removed it so that she could hold the sled with both hands. The shield is right between Lex and the predator. (1:26:58) When they emerge out of the tunnel, the shield is on her right arm.
Continuity mistake: When the group are in the pyramid, just after they have discovered the weapons inside the sarcophagus, they begin to take them out. When Sebastian says, "Don't touch them", all the doors start to close, and Lex runs past a guy twice. (Slo-mo may be necessary.) (00:40:15)
Continuity mistake: When the predators are watching the humans in a room, Weyland drops one of the guns from his backpack. Its position and distance on the floor from Weyland's boots changes between shots. (00:50:45)
Continuity mistake: When Sebastian says that the experts are right he gets up and says "All of them" you can see his hands are down. When it cuts to Lex saying "Meaning what exactly? Sebastian has his left hand by his waist. (00:09:05)
Continuity mistake: When Sebastian comes out of the hole to reveal the video camera he found, his red t-shirt has no mud/dirt on the front, but in the following shot when Sebastian is walking to the tent, there is a rather large long streak of mud/dirt on his t-shirt. (00:05:15)
Continuity mistake: Lex's initiation mark disappears in overhead shots.
Continuity mistake: When Lex Miller and Sebastian are talking at the side of the ship at the beginning, Miller says "Ii wish you'd consider coming with us ", it cuts to a shot from the side/back, she is looking either in Sebastian's direction or out to sea, yet in the following shot she is looking at Miller's face. (00:12:50)
Continuity mistake: When Lex is in Weyland's office on the ship, in one shot her arms are crossed, in the following shot, her hands are on the table, then back to crossed. (00:11:45)
Continuity mistake: When Lex is on her way to meet Weyland, Miller asks her to take a picture. When she first takes the camera, she puts her fingers on top, ready to take the picture, then she does it again. (00:06:25)
Continuity mistake: When Sebastian is checking the sand inside the tunnel, right before he finds the Pepsi Cola cap, you can see a close-up of his wrist and there is no sign of his watch. When it cuts his watch is visible. (00:05:00)
Continuity mistake: Close to the beginning, when the group is inside the pyramid below the sacrificial chamber, when the shot is from behind Lex and the others, note where the green light is, directly in the middle of the stairs. When it cuts to an overhead view, it's more to the left than the right. (00:36:50)
Continuity mistake: When Miller places his camera on the cabinet to take a picture of himself, the string from the camera changes position between the shots. (00:19:50)
Continuity mistake: In the beginning when Lex answers the phone, her earpiece and ear are visible. In the next shot both are covered by her cap. (00:03:55)
Continuity mistake: When Alexa and Sebastian are walking down a passageway in the pyramid, after everyone else has been killed, they begin to hear aliens all around them and look around. When Alexa shines her torch at an alien, she is on Sebastian's right side, but in the next shot she is on his left side, and her small torch vanishes from her right hand. (01:05:10)
Continuity mistake: When the group walks along a passageway, the predators are watching from above, and in one shot the distance of the guy at the back of the group goes from about 8 feet, to almost right next to the others between shots. (00:44:55)
Continuity mistake: When Sebastian has picked up the Pepsi Cola cap and about to uncover it, as Thomas is filming him, we can see his sleeve on his right arm is pulled up. When it cuts to a view through Thomas' camera his sleeve is further down his wrist. (00:05:15)
Continuity mistake: In the beginning, when the man notices the "Unidentified Heat Signature" warning on the screen, he removes his arm from the table twice in separate shots. (00:03:05)
Continuity mistake: When Lex and the others in the group reach the sarcophagus, Sebastian starts to turn one of the dials, the camera cuts to Weyland for his line, he has a flashlight in his right hand, yet in the following shot its no longer there. (00:37:50)
