Continuity mistake: In episode 10 Sayid shoots young Ben Linus in the chest, upper left part, just above his heart. It can be seen where the bullet enters the body. In episode 11 when Jin finds the boy and roll him over, the wound and blood is on the right side while the left is clean.
Continuity mistake: Season 5, episode 2 "The Lie": 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.
Continuity mistake: At the end, when we see Ben lighting a candle with a matchstick in the cathedral during the entering of Eloise, he puts out the matchstick so we see that the flame is gone. In the next shot, the flame is back and Ben is doing exactly the same thing, but we see it from another view.
Continuity mistake: Ses. 5, ep. 5, "This Place Is Death". When Daniel is telling Charlotte that he has a plan, and explains, "When we were back at the hatch, I talked to Desmond", he places his left hand on top of his right, holding Charlotte's hand between them (seen at bottom of the screen). When the angle changes to a shot above his shoulder, his left hand is suddenly back under Charlotte's head, with no time to move between shots.
Continuity mistake: In the replay of Sawyer meeting up with Jin, Jack, Kate, and Hurley, Sawyer takes his glasses off with his left hand. After the scene cuts to Kate and back, Sawyer is now taking his glasses off with his right hand. Not only that, but during that scene in the previous episode, he only took his glasses off with his right hand.
Continuity mistake: When Miles is sent to deliver "the package" (i.e. the dead body) to Dr. Chang, after the body is taken out of the van, Miles is seen closing the door to the back of the van. After a return from a flash forward and back to 1977, the door to the back of the van is open again.
Add timeSteven Bradley