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.
Tabula Rasa - S1-E3
Audio problem: When Charlie helps Claire with her bag, Claire remarks, "So you guys hiked all the way up that mountain for nothing," and in the next shot she keeps talking, but nothing is heard. (00:16:20)
Continuity mistake: When Ana-Lucia gives mouth to mouth on the little girl, the girls left side of the face is partially covered in sand. When it cuts her face is full of sand.
Continuity mistake: There is a shot where Sawyer tosses Jack a medicine bottle or something. First shot we see Jack reach out to catch it with his left hand. Next shot from the front Jack catches it with his right.
Revealing mistake: When Jack asks Locke for the vault combination he yells "Jack" (his own name) instead of "John". (00:01:55)
Tabula Rasa - S1-E3
Revealing mistake: When Sayid, Kate, Sawyer and the others make camp for the night, on their way back from hearing the French woman's transmission, they sit around the fire talking. Sawyer has a cut over his right eye, but in every other close-up of Sawyer the cut is over his left eye. The shots are flipped. (00:03:35)
Born to Run - S1-E22
Continuity mistake: After Kate's confession to the other survivors, she kneels down and scoops up the toy airplane with some sand. However, the next shot is a close-up of the airplane with its nose in the sand, in front of her. (00:35:35)
Continuity mistake: When Sawyer is put back in his cage after being given a pacemaker, he dips the sponge in the bucket straight away. As soon as the shot begins when Sawyer is looking at Kate undress, he is holding a completely dry sponge in his hand.
Continuity mistake: Ana-Lucia says that she never saw Nathan during the two hours the plane was in the air, which Cindy the flight-attendant agrees with, saying that she has a photographic memory for passengers. But the plane was actually in the air for eight hours before the crash, as revealed in the pilot, so, not only should Cindy remember him after that long, but they all should be able to tell the difference between two and eight hours.
Exodus (2) - S1-E24
Revealing mistake: After Sawyer jumps into the water to retrieve the rudder, Michael tosses him the rope then shouts, "Tie it around the rudder and we'll pull you in." Three shots later, in Sawyer's close-ups, mountains are visible at the right of the screen, whereas in the previous and following consecutive shots they are surrounded only by water at this point in time. (00:35:15)
The Greater Good (a.k.a. Sides) - S1-E21
Audio problem: When Sayid and Essam sit in the truck with explosives, Sayid says, "Her name is Nadia, they know where I can find her," and in the shot facing Essam, when he is done with that line Sayid's mouth continues to move, but nothing is heard. (00:06:35)
Exodus (2) - S1-E24
Continuity mistake: On the raft, when Michael walks over to Jin with the translation notebook, as Jin tinkers with the rudder, Jin's hand and handcuff change repeatedly in the following shots. (00:47:15)
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)
House of the Rising Sun - S1-E6
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)
Do No Harm - S1-E20
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.
Revealing mistake: Episode 4-4 "Eggtown": When Locke is in the basement hallway, he slams Ben's breakfast tray against the wall. The wall moves like it's thin plywood. Odd since basements are either thick wood or concrete over packed earth.
Continuity mistake: 4-3: When Sayid has shot the man on the golf course, he lowers his arm twice.
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.
One of Them - S2-E14
Visible crew/equipment: When Sawyer searches for the tree frog in the jungle he moves away from the shot towards the trees and when he comes back closer to the camera you can see the shadow of the cameraman on the tall grasses on the lower right.
Answer: He was eating a peice of an orange with the skin still on.
XIII