Maybe even more obvious... the little boy who played Arnold Winkler was in another episode. He pitched the ball to Opie that he hit into the Rimshaw house.. I'm pretty sure any way. It might have just been the lighting.
In Season 3 where "Barney Mends a Broken Heart", Andy states he does not know how to play Bridge when Barney brings over Lydia Crosswait as Andy's blind date. In Season 5 in Goober and the Art of Love, Andy, Helen, Barney, and Thelma Lou are all playing Bridge when Goober brings over Lydia Crosswait.
Fast learner...just like when Cousin Gloria was "teaching" him how to dance...
What always bugged me was how Aunt Bee left Opie home alone at night when she joined Andy and Barney at the town dump looking for trashed copies of Opie's newspaper.
Apparently, the idea of "China Town" was fascinating to the citizens of TAGS. Remember how Andy would say, of a person who was really dressed up and looking good, "He/she looks good enough to take to China Town."
"China Town, My China Town..." (notes surrounding and piano bench twirling round)
Aunt Bee also sang it in the episode where she dated the retired congressman.
Have you ever noticed that the squad car always looks dull even though it was brand new? I read that they sanded the paint to keep the car's finish from reflecting images back into the camera.
I would believe that Dud. I read that you had to wash your white shirts in coffee to dull it up or else it would be to bright. I'm sure there are lots of tricks they used in the film industry through out all the B&W years of movies and TV to balance the contracts of black and white.