The set of Gomer Pyle: USMC (1964) can be seen in the background during the scene with Floyd and Goober at the gas station.
This is the last episode that the interior of the courthouse is painted in a green shade. In Season 8, the interior of the courthouse is painted a light brown.
In the scene where Aunt Bee leaves Floyd's Barber Shop - a stand-in is used to show Floyd standing up from behind. Actor Howard McNear was suffering effects from a stroke that caused him to have problems with standing and walking.
Andy states to Goober that a tornado hit Mayberry 12 years ago. This is the first mention of it.