A Duel with Dartz: Part 2 - S4-E34
Continuity mistake: When Kaiba activates the spell card Reflect Energy, a mini satellite appears on the wall behind Dartz. The satellite appears directly underneath the carving on the wall of a person whose soul was stolen by Dartz. The shot cuts to Yugi and Kaiba, but when it cuts back, the satellite has changed position and is now positioned in between two individual carvings. (00:14:34)