Audio problem: Velma's voice comes out of Daphne's mouth at one point when they're scuba diving.
Audio problem: When the gang (except Fred) talk about unloading the Mystery Machine, there are no lip movements whatsoever.
Scooby-Doo, Where Are You! (1969)
2 audio problems in A Clue for Scooby-Doo - chronological order
Starring: Frank Welker, Don Messick, Casey Kasem, Nicole Jaffe
Continuity mistake: Scooby finds a clump of ape hair stuck in the wine cask. It cuts to the gang, then back to the cask as they walk up and suddenly the clump of hair is twice as thick. (00:16:45)
Shaggy: Scooby-Snacks won't work on me this time.
Daphne: Would you do it for a Shaggy-Snack? A little something I whipped up.
Shaggy: Huh? A Shaggy-Snack?
Daphne: Yes, it's a pot-pie, with pizza crust, anchovies, pepperoni, cherries, all in a thick chocolate sauce.
Shaggy: Hahahaha! I'll do it! I'll do it!
Trivia: Velma's famous line, "My glasses; I can't see without them!" was coined from her voice actress Nicole Jaffe when she lost her glasses during a recording session and then uttered of what became to be famous catchphrase of the bespectacled character. The writers liked the phrase so much that they decided to put the iconic scenes of Velma losing her glasses during the show.
Question: We never found out what the ham and chicken bones had to do with anything. They were ham and chicken until Scooby ate them. Afterwards, Shaggy wonders why the ghost would keep ham and chicken in the fridge. This was never answered in the episode. Why were they important?
Answer: Shaggy told the gang he found ham and chicken in the fridge. He said, "Why would a ghost need food?"
Chosen answer: A ghost wouldn't have to keep any food in the fridge - they don't need to eat. So it is one thing that proves the ghost is not a ghost.