The Mystery Duelist Part 1 - S2-E1
Continuity mistake: When Yugi is looking at his Millennium Puzzle in the mirror, his right hand is holding onto it. His index finger appears to be positioned an inch below the top of the puzzle, level with the eye. Then it cuts to a shot of the mirror where his index finger is closer to the top of the puzzle. His finger moves back down when the shot cuts again. (00:01:25)