Continuity mistake: When John-Boy finishes the roof repair he carries the ladder and places it beside the tree, then he notices the unlocked padlock on the garage door. In the closeup, the open lock is inserted through the latch facing the right, but in the wideshot the lock is inserted through the latch the opposite way. (00:25:25)
Visible crew/equipment: When John-Boy tells Mr. Rudge that he'd like to know all about his deceased son, during this touching scene there are closeups as Mr. Rudge's hand strokes the vehicle that belonged to his son, and we can see the reflection of the boom pole and mic, at least two crew members, filming equipment, and another vehicle on the polished chrome surface. (00:43:20)
Revealing mistake: Throughout most of the episode, The Car is a standard black with chrome trimming. But at the end it's suddenly beige when Johnboy and the kids are polishing it for their first ride.
Suggested correction: At the end it's not "suddenly beige." Mid-episode Mary Ellen mentions a family project to, "Design you a new-looking car" and Erin adds, "We can paint it." Soon John-Boy says, "I'd like to paint it a nice dignified shade of tan." In the penultimate scene John-Boy drives Hyder and Martha Rudge back home. Time passes offscreen. It cuts to the final scene with Mary Ellen and Erin placing their new cut/sewn seat covers in the newly painted tan car, and nobody is "polishing it for their first ride."