Return of the Sacred Beasts - S3-E22
Continuity mistake: When Marcel finds the room where the Sacred Beasts are kept, there are two cables leading out of the doorway and into the box where the cards are hidden inside. When Marcel first walks into the room, the cables are positioned to the left-hand side of the doorway, but when Adrian walks into the room seconds later, the cables are positioned to the right-hand side of the doorway. (00:19:20)