Factual error: When Olivia gets polio, she is at home. John is allowed to stay with her 24/7. It seems unlikely that the doctor, even if not taken to hospital, would allow John to stay in the room and risk contamination.
The Journey - S2-E1
Visible crew/equipment: After their visit to the beach, Maggie and John-Boy go into the nearby town to look for the restaurant, and when they stop at the corner we can see the chalk T-mark on the sidewalk, then they walk a bit and another chalk T-mark is visible, and when Maggie spots the restaurant two final chalk marks are visible at their feet. (00:38:15)
Visible crew/equipment: After all the children leave for school, the man from the electric company goes to the back of the Walton house to turn the power off, then while Olivia, Esther, and Zeb stand near the home John gets into the truck, and in the next shot of John in the truck we can see a crew member (who appears to be shirtless) through the windshield, walking around inside the barn (this cannot be anyone else other than a crew member). (00:05:10)
Visible crew/equipment: When John and Esther go to the Baldwin house in search of Zeb, while John leans on the vehicle door talking to Esther, in the closeups the shadow of the moving boom mic is visible at the back of the truck. (00:17:10)
Visible crew/equipment: After Zeb retrieves the misplaced perfume from the Baldwin sisters, when he meets up with John-Boy on the road, the reflections of crew members are visible on the truck's windshield when John-Boy arrives, and also when he backs up the truck. (00:36:40)
Continuity mistake: Esther's wedding band is missing from her finger while she's sweeping and talking to Maryellen on the stairwell. But seconds later when she heads outside it's suddenly back on.
Visible crew/equipment: At the start, when John-Boy walks into his house with a bag of groceries and the newspaper, just as he says hi to his mother the boom pole and mic are visible at the top, left corner of the screen. (00:01:45)
Visible crew/equipment: After Harley tells Verdie that he's an auto mechanic but things are slow, when Jim-Bob and Elizabeth rush over to John-Boy to tell him they can keep the peach tree, the shadow of the moving boom pole and mic is visible on the ground beside Jim-Bob, at the right side of the screen. (00:06:35)
Visible crew/equipment: When Verdie shows Harley the overalls for Jody, the reflection of the boom pole and mic are visible on the vehicle surface in the overhead shots. (00:19:25)
Visible crew/equipment: After Olivia and Esther talk to Verdie about Harley, while they're all busy in the kitchen with the peaches, when it cuts to Harley walking we can see set equipment at the right side of the screen. (00:21:30)
Visible crew/equipment: After John-Boy reads from the Count of Monte Cristo, everyone climbs down from the treehouse, and as Ben, Elizabeth, and Jim-Bob walks toward the Walton house, we can see a balding crew member wearing white pants, at the left side of the screen. (00:25:15)
Visible crew/equipment: When Jody asks John-Boy about Chateau d'If in The Count of Monte Cristo, Harley drives up in the automobile he fixed, and in the two shots facing Jody by himself, the shadow of the moving boom mic is visible on the wood beam beside Jody. (00:26:20)
Visible crew/equipment: After Esther scolds Zeb for falling asleep during the earlier sermon Ben tells John-Boy he wants to talk, and at the start of the next shot just as John walks to the truck, we can see black set equipment on wheels on the right side of the screen (in the next wide shot it's gone). (00:28:35)
Factual error: The Literary Digest Sheriff Epp is reading in Godsey's store is dated Aug 1936, when only a year has passed since the show's inception at 1932.
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)
Visible crew/equipment: When Oscar and the Baldwin sisters get up to leave after their visit with the Walton family, they walk to the front door and we can see set equipment at the right side of the screen. Then when they get into the vehicle and start to drive away, the reflections of some crew members are visible on the vehicle windows. (00:10:20)
Visible crew/equipment: While driving to the fair John-Boy tells Oscar it's the next turn on the right, then it cuts to two overhead shots of the fairgrounds, and in that second overhead shot we can see the crew's Panavision camera at the bottom right corner of the screen. As an aside, Panavision was founded in 1953. (00:28:40)
Factual error: The Woman talking with Mamie and Emily about the jams is wearing 1970s large framed glasses. (00:33:15)
Visible crew/equipment: While Erin is in the kitchen arguing with Esther and Olivia about Lancelot's behavior, the wheel from set equipment is visible at the right side of the screen. (00:22:20)