Audio problem: While Claire is lying down, just after she says, "Our only hunter's gonna get eaten so he can get the pregnant girl some more water," we hear Charlie say, "I wouldn't worry about that," but his lips just begin to open mid-sentence, and he certainly doesn't say that. (00:24:40)Super Grover
Revealing mistake: When Kate is in Ray's pickup, as they drive down the road, she looks into her side view mirror twice, over a minute apart. Firstly, the road that passes in the view reflected in the mirror is perfectly identical in both instances that Kate looks at it, which is impossible - the same shot is used twice. Secondly, the road that passes Ray's truck is completely different to the road that passes in the view reflected in the side mirror, they are obviously edited together. (00:21:55)Super Grover
Revealing mistake: In Boone's flashback in the hotel, you can see the Sydney Opera House out the window which looks nice, except that in order to see the it from that perspective the hotel would need to be EXACTLY where the Harbour Bridge is, but there are no hotels in Sydney that could provide this angle of view. (00:36:00)
Continuity mistake: Just as Sayid walks out of the building (number on both doors is 815), the white van pulls up. When Sayid gets in, in the exterior shot, the door he opens is opened to Sayid's left, but in the next interior shot, the door is opened to Sayid's right (the door to his left is closed). In this shot the building is seen behind Sayid - note the number 815 on both doors have vanished, and the chipped wall paint differs. (00:33:55)Super Grover
Revealing mistake: Sun's left earlobe has a cleft, but while Jin is still cuffed to the wreckage, Sun watches Michael head off through the trees (to cut firewood) and in this close-up it is Sun's right earlobe with the cleft. The shot is flipped. (00:28:40)Super Grover
Continuity mistake: When Jack and Ana-Lucia are talking on the rocks by the beach at the end of the episode, Ana-Lucia's hair is pulled back and is completely off her face. However, in two of her close-ups, there are two small forelocks loose in the wind near her temples, which are not present in any other shots during this scene.DavidK93
Continuity mistake: When Jack is walking into the medicine cupboard, he has a few small sweat stains on the back of his shirt. The camera cuts to show him turning to a different shelf, and for a split second you can see that his shirt back is now covered in a huge stain, and with large sweat rings under his arms. After he has injected Sayid, his shirt is completely dry again. (00:33:20)Twotall
Revealing mistake: As several camera angles show, Sawyer's makeshift stretcher was made by drilling multiple holes in the upper frame struts, through which was threaded rope made from dried roots or vines. The cast who supposedly constructed it were not carrying power drills among their primitive implements.