When Myrtle says "Well, there it is." We can see that there is no bell in the bell tower of the church. In season 1, episode 25 "The Church Bell," Mayberry gets a church bell.
Aunt Bee's (Frances Bavier) next to last appearance on Mayberry R.FD. For some unknown reason, she is credited in 11 episodes in season 3, but never appeared in any season 3 episode.
Emmett reveals in this episode that Howard Sprague's County Clerk job pays $92.50 a week.