Doug's Birthday Present / Doug's Fan Club - S4-E5
Other mistake: Doug's Fan Club: When Doug and Skeeter walk into the cinema, Doug sees some empty seats, and they start running towards them. In the shot of them running past the movie screen, their heads are transparent. (00:17:38)
Doug's Birthday Present / Doug's Fan Club - S4-E5
Continuity mistake: Doug's Fan Club: When Doug imagines himself doing a magic trick with Todd and Wesley, they both walk into the box for the trick. Todd's skin color immediately changes from yellow to white when Wesley walks past him. (00:18:36)