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Despite it being a live stage show of Disney's Doug, Roger is wearing his outfit from the Nickelodeon series.
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The monster is named Herman Melville because he tries to eat a book titled "Moby Dick" which was written by Herman Melville.
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Fentruck's hair at Swirly's.
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In this episode Patti can't sing, but in "Doug's No Dummy", she could sing.
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Near the end of the episode, when Whackhammer is holding the photo of herself, her sleeves are orange when they're supposed to be green.
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Before Doug listens to Chopin, Patti's mouth doesn't move when she says "What?".
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Storyline error: Doug got a new bike in one of the old episodes (it was blue), but here Doug's bike is back to his old one (red).
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The Golden Salmon has green hair when he's running out of the bank.
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Queue has red hair in this episode when her hair is supposed to be yellow (her hair is normal in "On the Road" and "Big Admission").
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Willy's shirt when he is at Swirly's is different from what it is supposed to be.
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Theda's mouth doesn't move when she says "Well" at dinner.
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Wooden poles in front of Doug's house are brown instead of white.
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Doug doesn't have any books when leaving the house with his umbrella, but when he meets Patti in front of the school he has books.
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When Judy jumps on Doug's bed, the blanket is purple instead of orange.
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The doors to the Beebe School are wooden when the students come out after seeing the ashes falling.
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Theda's hair changes colour at one point in the episode.
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Beebe's buttons dissapper when stating the casserole isn't French during dinner with the Funnie's.
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Doug's white sleeves turn completely green when he enters the kitchen with the puppy.
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Roger says his Dad has been living in Bloatsburg for 6 years, that would make Roger 8 years old when he moved away. But in episode 59 "Doug's in Debt!" Roger is shown as a baby when his Dad moves away.
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In Mr. Fort's daydream about Targetman, the wide shot has Mr. Fort with peach coloured skin instead of blue.