Best family TV mistakes of 1979

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Scooby-Doo and Scrappy-Doo picture

The Scarab Lives! - S1-E1

Plot hole: There is a "scarab alarm" when the blue scarab arrives, Shaggy even comments on hearing this. The problem is, The Blue Scarab is a comic book, so the villain and Shaggy wouldn't know what the Scarab alarm sounded like.

Dan Moat

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