Doug's Great Beet War / Doug's Magic Act - S3-E13
Revealing mistake: Doug's Magic Act: When all the items fall out of Doug's mirror cabinet, a purple bottle falls out last, and it is incorrectly layered behind the other items on the floor. (00:17:39)
Doug's Fat Cat / Doug and Patti P.I. - S3-E1
Revealing mistake: Doug's Fat Cat: After Stinky is revealed to be a mother, there is a shot of two of the kittens playing with each other. The two kittens keep turning into the opposite kitten repeatedly (you can tell because they keep flashing opposite colors), indicating that the animation is simply looped over and over. (00:11:14)
Doug's Fat Cat / Doug and Patti P.I. - S3-E1
Revealing mistake: Doug's Fat Cat: When Doug imagines himself reporting Stinky on the phone, when Stinky is chasing Porkchop, her tail is layered over the wall in front of her. (00:02:15)
Doug and the Yard of Doom / Doug's Garage Band - S3-E12
Revealing mistake: After the "Think Big" number, Doug writes an idea down in his journal. There are a brief couple of shots where the edge of the animation cel is visible. It is a white line that disappears.
