a well known blooper happens in the episode "A Black Day For Mayberry." Originally two actors cast to play U.S. Treasury agents and during the filming one of them suddenly stood up and collapsed into a seizure. So, Opie's dad (Ron Howard), Rance Howard was asked to fill in. But the suit for the part didn't fit, so they borrowed one of Andy Griffith's suits. A pretty huge blooper... you see two different actors wearing different suits playing the same character in the same scene. Whoa... Continuity.... not. This could never happen in Mt. Pilot.