The character A.J. Covington , played by actor David Huddleston, appeared the first time in this series in season one's episode #11 'The Literary Man' and at the end of that episode the narrator stated that the Waltons never see him again. But, the character appears again in this episode, played this time by actor George Dzundza, getting younger in the process, since Mr. Dzundza is junior to Mr. Huddleston by about 15 years. The narrator at the end of this episode states that A.J. Covington "twice came into our lives on Walton's Mountain and twice he wandered off."
The newspaper Ike delivers to Grandma clearly has a photo on the front page, but when she opens the paper up to read it, there is no photo.
The Tabor house seen in this episode is a completely different house than the one seen in The Literary Man (1972).
Back in the earlier episode, The Literary Man, AJ Covington was stated by Earl Hamner to never be seen by the Waltons again. Not true since AJ Covington came back as the screenwriter of the movie being made at Waltons Mountain. They made a glaring error.
Grandma Walton fusses over receiving a "day old" newspaper. But, the name of the paper is the "Jefferson County Weekly". For it to be "stale", it would have to be at least a week old.
The family is following the impending abdication of British King Edward VIII, which took place in December of 1936. However, the weather is mild and the trees contain foliage, which is inconsistent for December in a mountain community in that part of the United States.
When John-Boy refuses the directors offer standing in front of family home a modern turboprop aircraft can clearly be heard flying over. The first aircraft to utilize this technology was introduced in 1948.
During the scene where the family is listening to the radio report, part of a lighting rig is visible on the far left of the screen. After Grandma turns off the radio, a crew member briefly moves into view.
It's not likely that a New York based film company would go through the considerable expense and trouble to schlep 400 miles away in order to shoot a few scenes on location in Waltons Mountain, when instead they could find similar rural areas much closer to New York. Also, film sets require power sources, of which there are none out in the middle of nowhere by the abandoned Tabor house.