Continuity mistake: When Boone is tied up, with the goo in his hair, Locke has only his backpack slung over his left shoulder, when he holds the sheath in his left hand as he raises his right arm to throw the knife. After a brief cut to shocked Boone, Locke is in mid-throw and suddenly his second bag is slung diagonally across his chest and shoulder. (00:14:55)
Continuity mistake: As Kate and Jack head back to the beach, while Jack explains why they should move to the caves, when Kate lifts the bag and slings it round her shoulder, opposite sides of the bag face out between the first and second shots. Then, in the third shot it hangs from her shoulder very differently. (00:22:15)
Continuity mistake: In the scene where Michael and Sawyer are eating some fish on the beach (with Jin working on the raft) a pregnant Claire has a quick conversation with them and heads into the forest. About 20 seconds later Kate runs into Michael and Sawyer, and runs into the forest at full speed. Kate later finds Claire in labour, who somehow had gotten further out than Kate, even though Kate was running at high speed in the woods. There is no way a pregnant girl could have beat Kate to that position, even considering how long it took Jin to find them from the beach.
Continuity mistake: When Michael thinks Jin has set fire to his raft, he punches him in the face a couple of times. When Jin is leaving Sun later on, his face is miraculously unmarked. There is no sign of any swelling or bruising. He doesn't look like a guy who's just been punched in the face.
Continuity mistake: Towards the end of the episode, when Locke is preparing to shoot Ben, Ben starts talking about Charlotte and her team. Locke is then holding his gun in his right hand, and holding Ben with his left. As Ben is saying "Because I know what they're doing here", there is an angle change, and Locke is suddenly holding his gun with both hands.
Continuity mistake: When Jack wakes from his close encounter with Kate's sleeping pills, in the close-up his white pillow lies on the blue seat cushion, but in the next shot it lies on the grey blanket, which is spread over the cushions. (00:32:45)
Continuity mistake: When Jack and Ana-Lucia sit in the airport lounge she takes out her cell phone when it rings, and in this shot her glass is nearly full and has plenty of ice. Yet, when she leaves a moment later, the glass is nearly empty with no ice whatsoever. (00:12:50)
Continuity mistake: When Charlie walks with the crying baby on the beach, he meets Hurley and later Sawyer, and then later when Sawyer reads the "engine story" to sooth Turniphead, throughout these shots the baby's blanket constantly jumps off, on, off, etc. (00:23:40)
Continuity mistake: When Sayid is pulled upside down in the trap, he swings toward the tree and is stabbed by the branch. It is an entirely different branch in each of the following shots: first - when he is stabbed, second - when it sticks out of his thigh, third - when he pulls it out. (00:03:20)
Continuity mistake: When Danielle approaches the beach campsite, in his close-ups, Walt hides beside a tree and holds it with his left hand. However, in the shot between his close-ups, facing Danielle, Walt is hunched over with his hands leaning on his knees. (00:03:30)
Continuity mistake: When Sayid is in Essam's apartment, while they are holding their glasses of tea, the positions of the glasses change between shots. For example, in one close-up the handle is under Essam's fingers, but in the next shot it's on the other side. (00:12:30)
Continuity mistake: When Kate burns Joanna's passport photo in the close-up the corner of the book burns up, yet in the wider shot the corner does not burn, and in the next shot another change, including the lighter. Later, when Sawyer holds up the passport, the burned page edge is just a bit singed. (00:10:30 - 00:29:00)
Continuity mistake: When Sayid goes over to Shannon to help her with her luggage her trunk falls down open and some clothes fall out. Then Sayid picks up some shirts. But when it cuts to Shannon grabbing them from him he is holding fewer and different looking shirts than he picked up first. (00:16:15)