John-Boy Walton (Richard Thomas) says he is seventeen-years-old and Reverend Matthew Fordwick (John Ritter) says he is twenty-one, almost, meaning he is twenty. When this episode aired, Richard Thomas was twenty-one and John Ritter was twenty-four.
Robert Donner and Ralph Waite both appeared in the 1967 classic movie "Cool Hand Luke." Waite was a young, naive prisoner, and Donner was one of the rural prison "bosses."
Yancy Tucker's car is a 1928 Ford Model A.
When Rev. Fordwick drinks the recipe (unaware that it's bootleg whiskey) his speaking becomes gradually more slurred.