Continuity mistake: When Blair is walking between her two minions, she is holding green files and Zoe, the girl to the left (her right), is holding red files. After Serena enters the scene, the shot changes and Blair is now holding red files, while Zoe is holding the green files. (00:01:22 - 00:01:48)
Continuity mistake: In season five, when Blair is in the therapist's office with Chuck, she states that her dad left when she was fifteen. However in Blair Waldorf Must Pie in season 1 it shows that Harold was still with them last thanksgiving, when Blair must have been 16, because her birthday is before thanksgiving.
