Pop Me and We Both Go Down - S1-E10
Continuity mistake: In the episode "First Kiss," Justin has a girlfriend, Miranda. But in this episode Justin starts dating this new girl from his class, who's actually the same Miranda. This doesn't make any sense. How is she a new student and how could they just meet if they were dating eight episodes ago?
Continuity mistake: Dresden is missing, and Murphy comes to his office for clues. The right side window shade on the front door is pulled all the way down, and still is when Murphy leaves. But when she returns with a rescued Dresden at the end, the right door shade is halfway up, even though no one has been there to raise it. (00:40:30)
Continuity mistake: (Season 2 Episode 2) Near the end, as the worms have died and exploded trying to spawn, a shot shows Cutter, Claudia and Stephen ripping the spawning worms from their bodies. Stephen is shown with one in each hand and another hanging on the right of his chest. In the following shot he is seen ripping one off his right chin, which did not have any worm on it in the previous shot.
Continuity mistake: During the scene where Ned and Chuck are making a pie, Ned picks up the unfinished pie crust off the counter so Chuck can put more flour down. After she sifts the large pile of flour on to the counter, Ned moves to put the crust back down and now it is easily twice the size it was when he picked it up. There is no way for him to have rolled the crust larger off camera because Chuck was in the way and that was the whole reason he picked the crust up.
Continuity mistake: When we see Coraline in Mick's vision of when he was taking her dress off at a party, her tattoo is under one of her shoulders (I think it was her left one) but later on in the series we see Morgan/Coraline wipe off the make-up on where her tattoo is...on the opposite side.