Visible crew/equipment: While the family starts packing up their car with John's suitcases and boxes, right after John says, "I just don't want any kind of a big scene," a cluster of boom mics dip into view and stays there at the top of the screen, over Mary Ellen and Jason. Then in the closeup, as John agrees that they will all go see Olivia, a crew member wearing a blue shirt (with a front pocket) is visible in the vehicle's window reflection. (00:44:40)
Character mistake: When John-Boy reads the nursery rhyme "Simple Simon" to his nephew, John-Boy points to the colorful illustrations in this book and tells John Curtis, "See, that's Simple Simon, he's a bear." This is incorrect. In the illustrations, Simple Simon is a donkey, and it's the pieman who is a bear (he's wearing a chef's hat and apron). (00:40:50)
Character mistake: The NCO in charge of the Navy construction crew is wearing a commissioned officer's eagle insignia on his hat. A non-commissioned officer would have one with a Navy anchor on it. This mistake appears in several episodes showing Ben's Navy service.
The Hostage - S9-E21
Continuity mistake: In this episode the hidden door to the "secret recipe room" is controlled by pressing the top right panel on the wall. But pressing that top panel should not open or close the door. In 9x12 "The Hot Rod," when they first discover the "ingenius" panel, it is only the panel second from the top that works, none of the other panels control the "secret" door when Ike and Miss Emily press them. (00:20:05)
The Hostage - S9-E21
Continuity mistake: After the explosion in the Recipe room, when Octavia opens the hidden door there is no molding at the top of the door in the shot from the foyer, but in the next shot from inside the "secret" room, as Octavia enters the room, there is molding along the top of that door. (00:20:45)
Continuity mistake: When Elizabeth and Corabeth are up late because they can't sleep, Corabeth prepares two glasses of milk and walks toward Elizabeth, but the amount of milk in both glasses increases significantly between shots. (00:34:50)
Deliberate mistake: After Elizabeth goes upstairs with the pillowcases for Cindy, in the following shots there are a few long shots of Colonel Brunson's car on the road, and a couple of those shots are flipped - noticeable due to identical trees shown the opposite way. (00:03:55)
Other mistake: When Jim-Bob comes home unexpectedly while Drew is over, this scene takes place in the boys' bedroom. In the interior shot, when Jim-Bob tells Drew to douse the light Drew gets up and turns off the light in the boys' bedroom, then it cuts to the exterior shot which specifically shows their window going dark as the light is being turned off by Drew. The problem is in this exterior shot we are seeing the light go out in John-Boy's bedroom (where Mary Ellen resides with the baby), not the boys' bedroom. (00:26:00)
The Hot Rod - S9-E12
Continuity mistake: When Ike and the Baldwin sisters prepare to enter the "secret" room, in the shot from the foyer Miss Emily lights two new tall candles and they walk through the room's doorway. Then it cuts to inside the room as they all enter through the doorway, but both candles are now significantly shorter. (00:16:25)
Factual error: When Toni and John-Boy make a bet about who will locate Jason first John-Boy is holding a book, and just as they agree to the loser buying a bottle of champagne, this book's author and title are visible on the spine. That book is "A Pocketful of Rye" written by A. J. Cronin, and published in 1969, though this episode takes place in 1945. (00:30:35)
Continuity mistake: When Toni locates Jason at the 171st repple depple the two embrace, and in the following shots Toni's watch repeatedly disappears and reappears on her wrist, depending on the angle of the shot. (00:16:20)
Visible crew/equipment: While Elizabeth and Drew are fishing, when she walks over to stand beside Molly she and Drew begin arguing, and we can see the bulging outline of the mic transmitter at the back of Elizabeth's waist, particularly when she mounts the horse. (00:04:50)
Visible crew/equipment: After Colonel Brunson's funeral it cuts to Rose in the living room, and when Elizabeth and Drew walk into the Walton house, the black T-mark is visible on the rug where Elizabeth stands. (00:07:00)
The Hot Rod - S9-E12
Continuity mistake: When John-Boy, Jason, and Ben share the Recipe with Jim-Bob for a celebration, John-Boy sits on the bed directly below the picture of the biplane fighters (seen in three shots), but each time it cuts to the shots facing Jim-Bob we see in the mirror's reflection that it's Jason sitting below that picture, and John-Boy is further up on the bed. (00:15:05)
Factual error: When John Curtis walks out to the porch he's carrying a storybook, which John-Boy reads to him, and the year is late 1945 or early 1946. This over-sized Golden book is Richard Scarry's "Best Mother Goose Ever," and at its earliest it was published in 1970 with Scarry's illustrations of "Three Little Kittens" on the cover, and "Jack Be Nimble" on the back cover. (00:39:40)
Visible crew/equipment: After Ike goes off to help Jim-Bob and Jason with the antenna cable, just at the moment it cuts to John-Boy on the porch, at the start of the shot, on the right side of the screen we can see the shadow of someone's arm motioning to the young actor who is playing John Curtis, so he can open the screen door to step onto the porch at the correct time. (00:39:40)
Continuity mistake: When John and Jason remove the rolltop desk from the pickup, in the exterior shot Jason carries the left side and John carries the right side, but as they walk through the doorway it cuts to an interior shot and with the desk still in the air the two men have suddenly switched sides. (00:08:25)
Visible crew/equipment: When Ben and Cindy enter the mill's office to speak to John, as John says, "We've got a lot of talking to do," the chalk T-mark is visible on the floor behind Cindy. John will stand at this spot when he gets up and tells the couple not to worry about him. (00:17:45)
Revealing mistake: While Cindy and Ben are going through Colonel Brunson's belongings Cindy finds the Adoption Decree, and begins reading it. The funny thing is there's a closeup of the document, and it's apparent that it's actually a studio contract. Even without pausing we can read things such as: "Use of Double," "Location Expenses" or "Damage to Wardrobe." Though if it's paused we can read entire lines such as: "Location Expenses: Where the services of the Artist are required to be performed outside of the City of Los Angeles or its environs, the Producer shall transport the Artist and the reasonable personal baggage of the Artist..." (00:08:55)
Factual error: After Cindy admits that she needs to know why she was put up for adoption, when it cuts to a clip of Washington DC with the Washington Monument and Jefferson Memorial in the background, we also see vehicles not appropriate for 1945. (00:14:45)
