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)
Doug's Great Beet War / Doug's Magic Act - S3-E13
Continuity mistake: Doug's Great Beet War: In Doug's imagination, when he grabs the tower and it begins to fall apart, part of the tower disappears mid-shot. (00:05:14)
Doug's Career Anxiety / Doug's Big Brawl - S3-E4
Continuity mistake: Doug's Big Brawl: When Doug starts talking to Larry on the phone, the camera zooms in on him. Skeeter is visible at the right side of the screen, then he disappears mid-shot. (00:16:32)
Doug's Career Anxiety / Doug's Big Brawl - S3-E4
Continuity mistake: Doug's Career Anxiety: When the kids are sitting around the table deciding what project they will make, there are eight chairs around the table. When the kids leave the room later on, some of the chairs have disappeared. (00:06:52)
Doug Inc. / Doug's Nightmare on Jumbo St. - S3-E10
Continuity mistake: Doug's Nightmare on Jumbo Street: When Doug has a nightmare about the Abnormal, he runs into his garage, and the doorknob is visible on the door. When he shuts the door and leans against it, the doorknob is suddenly gone. It comes back in the next shot. (00:16:06)
Doug's Fat Cat / Doug and Patti P.I. - S3-E1
Continuity mistake: Doug's Fat Cat: When Doug is filling up Stinky's food bowl, the name on the bowl is misspelled as "Stiniky." When he places the bowl on the floor, the name is spelled correctly. (00:05:37)
Doug's Fat Cat / Doug and Patti P.I. - S3-E1
Continuity mistake: Doug and Patti P.I.: When Doug and Patti tackle Skeeter, they pin him down, and Patti's hands are on the left side of his chest, and Doug's hands are on the right. In the close-up of Skeeter, their hands have switched sides; then go back to normal in the next shot. (00:20:03)
Doug's Fat Cat / Doug and Patti P.I. - S3-E1
Other 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 is Quailman / Doug Out in Left Field - S1-E12
Continuity mistake: Doug is Quailman: When Doug tells Porkchop to sign his name on the comic book, his pencil is tucked in his ear. When Porkchop prints the page and they both shake hands, the pencil is gone. (00:02:00)
Doug is Quailman / Doug Out in Left Field - S1-E12
Other mistake: Doug is Quailman: When Doug, as Quailman, gives everyone's brains back and they start cheering, the computer and boy behind Skeeter are layered over him for one frame. (00:09:24)
Doug's Doodle / Doug's Runaway Journal - S1-E10
Other mistake: Doug's Doodle: At the end of the episode, when Doug imagines himself as Smash Adams driving out of the classroom, right before he takes off, his car is layered over the desk in front of it. (00:22:36)
Doug Takes a Hike / Doug Rocks - S1-E4
Other mistake: Doug Rocks: When Doug and Skeeter win the contest to see The Beets, when Roger says, "Gee Funnie, I guess even a loser like you gets lucky once in a while," the logo on Roger's shirt is reversed. (00:17:23)