Revealing mistake: The painted backdrop depicting the street and distant buildings is much too close to the Mayberry City Council office. As people come and go, they cast shadows on the backdrop.
Mayberry R.F.D. (1968)
1 revealing mistake in The Panel Show - chronological order
Starring: Ken Berry, George Lindsey, Jack Dodson, Paul Hartman
Aunt Bee's Cruise: Part 1 - S1-E15
Revealing mistake: Aunt Bee is traveling on a cruise ship. The "water" in the background is a painted backdrop which is made all the more obvious by the painted whitecaps.