Continuity mistake: In early versions of the episode, Luz is shown wearing her Hexside school uniform before she even receives it. This mistake spoils the ending. Fortunately, it was fixed later on. (00:00:01 - 00:00:40)
Remembrance - S1-E1
Continuity mistake: Right at the beginning, the camera zooms into the Enterprise through a view that shows 3 windows of equal size. In the rest of the scene, Jean-Luc Picard and Data are playing poker in front of two side windows and a central window that is wider than the other two combined. (00:00:30)