Leo Gordon, who portrays handicapped ex-convict Luke Comstock, had himself been wounded in a robbery attempt and served time in San Quentin.
The opening scene is the first time the U.S. Mail slot appears under the Justice of the Peace sign on the front door of the Mayberry Courthouse. Previously, the mail was delivered right to the Sheriff's desk, as seen in Season 2, Episode 9, "Aunt Bee's Brief Encounter."
Actor Leo Gordon was not only an ex-con like Luke, but he also took full advantage of the prison library and utilized the G.I. Bill to get an education. In his case, with the theater arts.
This episode reveals that Andy hides his gun and ammunition on top of the cabinet in the dining room of his house.