The Dark Spirit Revealed: Part 2 - S2-E34
Continuity mistake: When Gamma the Magnet Warrior's attack is deflected back onto Yugi, two monster cards can be seen on his duel disk. The two monster cards are next to each other. But seconds later, when Bakura tells Yugi he'll see what Darl Sanctuary is capable of soon enough, there is suddenly an extra monster card zone shown in between the two cards. (00:03:04 - 00:03:36)