There's A Demon Shark In The Froggy Dark - S1-E9
Deliberate mistake: Unless they're super strong, none of Mystery Inc could've thrown an anchor to the top of a cliff.
The Scooby Doo Show (1976)
1 mistake in There's A Demon Shark In The Froggy Dark
Starring: Frank Welker, Don Messick, Casey Kasem, John Stephenson
