Other mistake: While John and his sons are at the pig pen talking about Rover, in the first wideshot facing them all we can see the Baldwins' stationary car parked near the pen, waiting for the cue to move at the proper time. During their entire conversation nobody remarks or reacts to the Baldwins' car being right there, not until the second wideshot, just as the vehicle moves closer to the Walton house, and then everyone exclaims, "Baldwin sisters/ladies!" as if they just now showed up. (00:03:55)
The Thanksgiving Story - S2-E10
Other mistake: During John-Boy's entrance exam at Boatwright University, when he's given the pamphlet and history test questions, note three of the questions include the contraction "it's" which is incorrect within those given questions. Each question should have used "its" without an apostrophe. Additionally, the sign on the University's wall reads "keep your eyes on you own paper" instead of "your own paper." (01:00:35)